Error code: CAA50021 when trying to login to office 365 – Microsoft 365

August 8, 2025

Sometimes, she can log in to one of the Office apps, but when attempting to open another app, it either gets stuck loading or prompts for login again with the CAA50021 code. We have tried the following steps: Removed all credentials from credential manager. Checked Azure AD to ensure nothing was blocking the client from signing in.

https://techcommunity.microsoft.com/discussions/microsoft-365/error-code-caa50021-when-trying-to-login-to-office-365/4059554

Error code: CAA50021 when trying to login to office 365 – Microsoft 365 <body> <h1> Array ( [0] => wrror code: caa50021 when trying to login to office 365 – microsoft 365 [1] => srror code: caa50021 when trying to login to office 365 – microsoft 365 [2] => drror code: caa50021 when trying to login to office 365 – microsoft 365 [3] => rrror code: caa50021 when trying to login to office 365 – microsoft 365 [4] => 4rror code: caa50021 when trying to login to office 365 – microsoft 365 [5] => 3rror code: caa50021 when trying to login to office 365 – microsoft 365 [6] => eeror code: caa50021 when trying to login to office 365 – microsoft 365 [7] => edror code: caa50021 when trying to login to office 365 – microsoft 365 [8] => efror code: caa50021 when trying to login to office 365 – microsoft 365 [9] => etror code: caa50021 when trying to login to office 365 – microsoft 365 [10] => e5ror code: caa50021 when trying to login to office 365 – microsoft 365 [11] => e4ror code: caa50021 when trying to login to office 365 – microsoft 365 [12] => ereor code: caa50021 when trying to login to office 365 – microsoft 365 [13] => erdor code: caa50021 when trying to login to office 365 – microsoft 365 [14] => erfor code: caa50021 when trying to login to office 365 – microsoft 365 [15] => ertor code: caa50021 when trying to login to office 365 – microsoft 365 [16] => er5or code: caa50021 when trying to login to office 365 – microsoft 365 [17] => er4or code: caa50021 when trying to login to office 365 – microsoft 365 [18] => errir code: caa50021 when trying to login to office 365 – microsoft 365 [19] => errkr code: caa50021 when trying to login to office 365 – microsoft 365 [20] => errlr code: caa50021 when trying to login to office 365 – microsoft 365 [21] => errpr code: caa50021 when trying to login to office 365 – microsoft 365 [22] => err0r code: caa50021 when trying to login to office 365 – microsoft 365 [23] => err9r code: caa50021 when trying to login to office 365 – microsoft 365 [24] => erroe code: caa50021 when trying to login to office 365 – microsoft 365 [25] => errod code: caa50021 when trying to login to office 365 – microsoft 365 [26] => errof code: caa50021 when trying to login to office 365 – microsoft 365 [27] => errot code: caa50021 when trying to login to office 365 – microsoft 365 [28] => erro5 code: caa50021 when trying to login to office 365 – microsoft 365 [29] => erro4 code: caa50021 when trying to login to office 365 – microsoft 365 [30] => error xode: caa50021 when trying to login to office 365 – microsoft 365 [31] => error vode: caa50021 when trying to login to office 365 – microsoft 365 [32] => error fode: caa50021 when trying to login to office 365 – microsoft 365 [33] => error dode: caa50021 when trying to login to office 365 – microsoft 365 [34] => error cide: caa50021 when trying to login to office 365 – microsoft 365 [35] => error ckde: caa50021 when trying to login to office 365 – microsoft 365 [36] => error clde: caa50021 when trying to login to office 365 – microsoft 365 [37] => error cpde: caa50021 when trying to login to office 365 – microsoft 365 [38] => error c0de: caa50021 when trying to login to office 365 – microsoft 365 [39] => error c9de: caa50021 when trying to login to office 365 – microsoft 365 [40] => error cose: caa50021 when trying to login to office 365 – microsoft 365 [41] => error coxe: caa50021 when trying to login to office 365 – microsoft 365 [42] => error coce: caa50021 when trying to login to office 365 – microsoft 365 [43] => error cofe: caa50021 when trying to login to office 365 – microsoft 365 [44] => error core: caa50021 when trying to login to office 365 – microsoft 365 [45] => error coee: caa50021 when trying to login to office 365 – microsoft 365 [46] => error codw: caa50021 when trying to login to office 365 – microsoft 365 [47] => error cods: caa50021 when trying to login to office 365 – microsoft 365 [48] => error codd: caa50021 when trying to login to office 365 – microsoft 365 [49] => error codr: caa50021 when trying to login to office 365 – microsoft 365 [50] => error cod4: caa50021 when trying to login to office 365 – microsoft 365 [51] => error cod3: caa50021 when trying to login to office 365 – microsoft 365 [52] => error code: xaa50021 when trying to login to office 365 – microsoft 365 [53] => error code: vaa50021 when trying to login to office 365 – microsoft 365 [54] => error code: faa50021 when trying to login to office 365 – microsoft 365 [55] => error code: daa50021 when trying to login to office 365 – microsoft 365 [56] => error code: cza50021 when trying to login to office 365 – microsoft 365 [57] => error code: csa50021 when trying to login to office 365 – microsoft 365 [58] => error code: cwa50021 when trying to login to office 365 – microsoft 365 [59] => error code: cqa50021 when trying to login to office 365 – microsoft 365 [60] => error code: caz50021 when trying to login to office 365 – microsoft 365 [61] => error code: cas50021 when trying to login to office 365 – microsoft 365 [62] => error code: caw50021 when trying to login to office 365 – microsoft 365 [63] => error code: caq50021 when trying to login to office 365 – microsoft 365 [64] => error code: caa40021 when trying to login to office 365 – microsoft 365 [65] => error code: caar0021 when trying to login to office 365 – microsoft 365 [66] => error code: caat0021 when trying to login to office 365 – microsoft 365 [67] => error code: caa60021 when trying to login to office 365 – microsoft 365 [68] => error code: caa59021 when trying to login to office 365 – microsoft 365 [69] => error code: caa5o021 when trying to login to office 365 – microsoft 365 [70] => error code: caa5p021 when trying to login to office 365 – microsoft 365 [71] => error code: caa5-021 when trying to login to office 365 – microsoft 365 [72] => error code: caa50921 when trying to login to office 365 – microsoft 365 [73] => error code: caa50o21 when trying to login to office 365 – microsoft 365 [74] => error code: caa50p21 when trying to login to office 365 – microsoft 365 [75] => error code: caa50-21 when trying to login to office 365 – microsoft 365 [76] => error code: caa50011 when trying to login to office 365 – microsoft 365 [77] => error code: caa500q1 when trying to login to office 365 – microsoft 365 [78] => error code: caa500w1 when trying to login to office 365 – microsoft 365 [79] => error code: caa50031 when trying to login to office 365 – microsoft 365 [80] => error code: caa50022 when trying to login to office 365 – microsoft 365 [81] => error code: caa5002q when trying to login to office 365 – microsoft 365 [82] => error code: caa50021 qhen trying to login to office 365 – microsoft 365 [83] => error code: caa50021 ahen trying to login to office 365 – microsoft 365 [84] => error code: caa50021 shen trying to login to office 365 – microsoft 365 [85] => error code: caa50021 ehen trying to login to office 365 – microsoft 365 [86] => error code: caa50021 3hen trying to login to office 365 – microsoft 365 [87] => error code: caa50021 2hen trying to login to office 365 – microsoft 365 [88] => error code: caa50021 wgen trying to login to office 365 – microsoft 365 [89] => error code: caa50021 wben trying to login to office 365 – microsoft 365 [90] => error code: caa50021 wnen trying to login to office 365 – microsoft 365 [91] => error code: caa50021 wjen trying to login to office 365 – microsoft 365 [92] => error code: caa50021 wuen trying to login to office 365 – microsoft 365 [93] => error code: caa50021 wyen trying to login to office 365 – microsoft 365 [94] => error code: caa50021 whwn trying to login to office 365 – microsoft 365 [95] => error code: caa50021 whsn trying to login to office 365 – microsoft 365 [96] => error code: caa50021 whdn trying to login to office 365 – microsoft 365 [97] => error code: caa50021 whrn trying to login to office 365 – microsoft 365 [98] => error code: caa50021 wh4n trying to login to office 365 – microsoft 365 [99] => error code: caa50021 wh3n trying to login to office 365 – microsoft 365 [100] => error code: caa50021 wheb trying to login to office 365 – microsoft 365 [101] => error code: caa50021 whem trying to login to office 365 – microsoft 365 [102] => error code: caa50021 whej trying to login to office 365 – microsoft 365 [103] => error code: caa50021 wheh trying to login to office 365 – microsoft 365 [104] => error code: caa50021 when rrying to login to office 365 – microsoft 365 [105] => error code: caa50021 when frying to login to office 365 – microsoft 365 [106] => error code: caa50021 when grying to login to office 365 – microsoft 365 [107] => error code: caa50021 when yrying to login to office 365 – microsoft 365 [108] => error code: caa50021 when 6rying to login to office 365 – microsoft 365 [109] => error code: caa50021 when 5rying to login to office 365 – microsoft 365 [110] => error code: caa50021 when teying to login to office 365 – microsoft 365 [111] => error code: caa50021 when tdying to login to office 365 – microsoft 365 [112] => error code: caa50021 when tfying to login to office 365 – microsoft 365 [113] => error code: caa50021 when ttying to login to office 365 – microsoft 365 [114] => error code: caa50021 when t5ying to login to office 365 – microsoft 365 [115] => error code: caa50021 when t4ying to login to office 365 – microsoft 365 [116] => error code: caa50021 when trting to login to office 365 – microsoft 365 [117] => error code: caa50021 when trging to login to office 365 – microsoft 365 [118] => error code: caa50021 when trhing to login to office 365 – microsoft 365 [119] => error code: caa50021 when truing to login to office 365 – microsoft 365 [120] => error code: caa50021 when tr7ing to login to office 365 – microsoft 365 [121] => error code: caa50021 when tr6ing to login to office 365 – microsoft 365 [122] => error code: caa50021 when tryung to login to office 365 – microsoft 365 [123] => error code: caa50021 when tryjng to login to office 365 – microsoft 365 [124] => error code: caa50021 when trykng to login to office 365 – microsoft 365 [125] => error code: caa50021 when tryong to login to office 365 – microsoft 365 [126] => error code: caa50021 when try9ng to login to office 365 – microsoft 365 [127] => error code: caa50021 when try8ng to login to office 365 – microsoft 365 [128] => error code: caa50021 when tryibg to login to office 365 – microsoft 365 [129] => error code: caa50021 when tryimg to login to office 365 – microsoft 365 [130] => error code: caa50021 when tryijg to login to office 365 – microsoft 365 [131] => error code: caa50021 when tryihg to login to office 365 – microsoft 365 [132] => error code: caa50021 when tryinf to login to office 365 – microsoft 365 [133] => error code: caa50021 when tryinv to login to office 365 – microsoft 365 [134] => error code: caa50021 when tryinb to login to office 365 – microsoft 365 [135] => error code: caa50021 when tryinh to login to office 365 – microsoft 365 [136] => error code: caa50021 when tryiny to login to office 365 – microsoft 365 [137] => error code: caa50021 when tryint to login to office 365 – microsoft 365 [138] => error code: caa50021 when trying ro login to office 365 – microsoft 365 [139] => error code: caa50021 when trying fo login to office 365 – microsoft 365 [140] => error code: caa50021 when trying go login to office 365 – microsoft 365 [141] => error code: caa50021 when trying yo login to office 365 – microsoft 365 [142] => error code: caa50021 when trying 6o login to office 365 – microsoft 365 [143] => error code: caa50021 when trying 5o login to office 365 – microsoft 365 [144] => error code: caa50021 when trying ti login to office 365 – microsoft 365 [145] => error code: caa50021 when trying tk login to office 365 – microsoft 365 [146] => error code: caa50021 when trying tl login to office 365 – microsoft 365 [147] => error code: caa50021 when trying tp login to office 365 – microsoft 365 [148] => error code: caa50021 when trying t0 login to office 365 – microsoft 365 [149] => error code: caa50021 when trying t9 login to office 365 – microsoft 365 [150] => error code: caa50021 when trying to kogin to office 365 – microsoft 365 [151] => error code: caa50021 when trying to pogin to office 365 – microsoft 365 [152] => error code: caa50021 when trying to oogin to office 365 – microsoft 365 [153] => error code: caa50021 when trying to ligin to office 365 – microsoft 365 [154] => error code: caa50021 when trying to lkgin to office 365 – microsoft 365 [155] => error code: caa50021 when trying to llgin to office 365 – microsoft 365 [156] => error code: caa50021 when trying to lpgin to office 365 – microsoft 365 [157] => error code: caa50021 when trying to l0gin to office 365 – microsoft 365 [158] => error code: caa50021 when trying to l9gin to office 365 – microsoft 365 [159] => error code: caa50021 when trying to lofin to office 365 – microsoft 365 [160] => error code: caa50021 when trying to lovin to office 365 – microsoft 365 [161] => error code: caa50021 when trying to lobin to office 365 – microsoft 365 [162] => error code: caa50021 when trying to lohin to office 365 – microsoft 365 [163] => error code: caa50021 when trying to loyin to office 365 – microsoft 365 [164] => error code: caa50021 when trying to lotin to office 365 – microsoft 365 [165] => error code: caa50021 when trying to logun to office 365 – microsoft 365 [166] => error code: caa50021 when trying to logjn to office 365 – microsoft 365 [167] => error code: caa50021 when trying to logkn to office 365 – microsoft 365 [168] => error code: caa50021 when trying to logon to office 365 – microsoft 365 [169] => error code: caa50021 when trying to log9n to office 365 – microsoft 365 [170] => error code: caa50021 when trying to log8n to office 365 – microsoft 365 [171] => error code: caa50021 when trying to logib to office 365 – microsoft 365 [172] => error code: caa50021 when trying to logim to office 365 – microsoft 365 [173] => error code: caa50021 when trying to logij to office 365 – microsoft 365 [174] => error code: caa50021 when trying to logih to office 365 – microsoft 365 [175] => error code: caa50021 when trying to login ro office 365 – microsoft 365 [176] => error code: caa50021 when trying to login fo office 365 – microsoft 365 [177] => error code: caa50021 when trying to login go office 365 – microsoft 365 [178] => error code: caa50021 when trying to login yo office 365 – microsoft 365 [179] => error code: caa50021 when trying to login 6o office 365 – microsoft 365 [180] => error code: caa50021 when trying to login 5o office 365 – microsoft 365 [181] => error code: caa50021 when trying to login ti office 365 – microsoft 365 [182] => error code: caa50021 when trying to login tk office 365 – microsoft 365 [183] => error code: caa50021 when trying to login tl office 365 – microsoft 365 [184] => error code: caa50021 when trying to login tp office 365 – microsoft 365 [185] => error code: caa50021 when trying to login t0 office 365 – microsoft 365 [186] => error code: caa50021 when trying to login t9 office 365 – microsoft 365 [187] => error code: caa50021 when trying to login to iffice 365 – microsoft 365 [188] => error code: caa50021 when trying to login to kffice 365 – microsoft 365 [189] => error code: caa50021 when trying to login to lffice 365 – microsoft 365 [190] => error code: caa50021 when trying to login to pffice 365 – microsoft 365 [191] => error code: caa50021 when trying to login to 0ffice 365 – microsoft 365 [192] => error code: caa50021 when trying to login to 9ffice 365 – microsoft 365 [193] => error code: caa50021 when trying to login to odfice 365 – microsoft 365 [194] => error code: caa50021 when trying to login to ocfice 365 – microsoft 365 [195] => error code: caa50021 when trying to login to ovfice 365 – microsoft 365 [196] => error code: caa50021 when trying to login to ogfice 365 – microsoft 365 [197] => error code: caa50021 when trying to login to otfice 365 – microsoft 365 [198] => error code: caa50021 when trying to login to orfice 365 – microsoft 365 [199] => error code: caa50021 when trying to login to ofdice 365 – microsoft 365 [200] => error code: caa50021 when trying to login to ofcice 365 – microsoft 365 [201] => error code: caa50021 when trying to login to ofvice 365 – microsoft 365 [202] => error code: caa50021 when trying to login to ofgice 365 – microsoft 365 [203] => error code: caa50021 when trying to login to oftice 365 – microsoft 365 [204] => error code: caa50021 when trying to login to ofrice 365 – microsoft 365 [205] => error code: caa50021 when trying to login to offuce 365 – microsoft 365 [206] => error code: caa50021 when trying to login to offjce 365 – microsoft 365 [207] => error code: caa50021 when trying to login to offkce 365 – microsoft 365 [208] => error code: caa50021 when trying to login to offoce 365 – microsoft 365 [209] => error code: caa50021 when trying to login to off9ce 365 – microsoft 365 [210] => error code: caa50021 when trying to login to off8ce 365 – microsoft 365 [211] => error code: caa50021 when trying to login to offixe 365 – microsoft 365 [212] => error code: caa50021 when trying to login to offive 365 – microsoft 365 [213] => error code: caa50021 when trying to login to offife 365 – microsoft 365 [214] => error code: caa50021 when trying to login to offide 365 – microsoft 365 [215] => error code: caa50021 when trying to login to officw 365 – microsoft 365 [216] => error code: caa50021 when trying to login to offics 365 – microsoft 365 [217] => error code: caa50021 when trying to login to officd 365 – microsoft 365 [218] => error code: caa50021 when trying to login to officr 365 – microsoft 365 [219] => error code: caa50021 when trying to login to offic4 365 – microsoft 365 [220] => error code: caa50021 when trying to login to offic3 365 – microsoft 365 [221] => error code: caa50021 when trying to login to office 265 – microsoft 365 [222] => error code: caa50021 when trying to login to office w65 – microsoft 365 [223] => error code: caa50021 when trying to login to office e65 – microsoft 365 [224] => error code: caa50021 when trying to login to office 465 – microsoft 365 [225] => error code: caa50021 when trying to login to office 355 – microsoft 365 [226] => error code: caa50021 when trying to login to office 3t5 – microsoft 365 [227] => error code: caa50021 when trying to login to office 3y5 – microsoft 365 [228] => error code: caa50021 when trying to login to office 375 – microsoft 365 [229] => error code: caa50021 when trying to login to office 364 – microsoft 365 [230] => error code: caa50021 when trying to login to office 36r – microsoft 365 [231] => error code: caa50021 when trying to login to office 36t – microsoft 365 [232] => error code: caa50021 when trying to login to office 366 – microsoft 365 [233] => error code: caa50021 when trying to login to office 365 ᰫ microsoft 365 [234] => error code: caa50021 when trying to login to office 365 &#u211; microsoft 365 [235] => error code: caa50021 when trying to login to office 365 &#i211; microsoft 365 [236] => error code: caa50021 when trying to login to office 365 ⏻ microsoft 365 [237] => error code: caa50021 when trying to login to office 365 ᾯ microsoft 365 [238] => error code: caa50021 when trying to login to office 365 &#8q11; microsoft 365 [239] => error code: caa50021 when trying to login to office 365 &#8w11; microsoft 365 [240] => error code: caa50021 when trying to login to office 365 ⁷ microsoft 365 [241] => error code: caa50021 when trying to login to office 365 ” microsoft 365 [242] => error code: caa50021 when trying to login to office 365 &#82q1; microsoft 365 [243] => error code: caa50021 when trying to login to office 365 — microsoft 365 [244] => error code: caa50021 when trying to login to office 365 &#821q; microsoft 365 [245] => error code: caa50021 when trying to login to office 365 – nicrosoft 365 [246] => error code: caa50021 when trying to login to office 365 – kicrosoft 365 [247] => error code: caa50021 when trying to login to office 365 – jicrosoft 365 [248] => error code: caa50021 when trying to login to office 365 – mucrosoft 365 [249] => error code: caa50021 when trying to login to office 365 – mjcrosoft 365 [250] => error code: caa50021 when trying to login to office 365 – mkcrosoft 365 [251] => error code: caa50021 when trying to login to office 365 – mocrosoft 365 [252] => error code: caa50021 when trying to login to office 365 – m9crosoft 365 [253] => error code: caa50021 when trying to login to office 365 – m8crosoft 365 [254] => error code: caa50021 when trying to login to office 365 – mixrosoft 365 [255] => error code: caa50021 when trying to login to office 365 – mivrosoft 365 [256] => error code: caa50021 when trying to login to office 365 – mifrosoft 365 [257] => error code: caa50021 when trying to login to office 365 – midrosoft 365 [258] => error code: caa50021 when trying to login to office 365 – miceosoft 365 [259] => error code: caa50021 when trying to login to office 365 – micdosoft 365 [260] => error code: caa50021 when trying to login to office 365 – micfosoft 365 [261] => error code: caa50021 when trying to login to office 365 – mictosoft 365 [262] => error code: caa50021 when trying to login to office 365 – mic5osoft 365 [263] => error code: caa50021 when trying to login to office 365 – mic4osoft 365 [264] => error code: caa50021 when trying to login to office 365 – micrisoft 365 [265] => error code: caa50021 when trying to login to office 365 – micrksoft 365 [266] => error code: caa50021 when trying to login to office 365 – micrlsoft 365 [267] => error code: caa50021 when trying to login to office 365 – micrpsoft 365 [268] => error code: caa50021 when trying to login to office 365 – micr0soft 365 [269] => error code: caa50021 when trying to login to office 365 – micr9soft 365 [270] => error code: caa50021 when trying to login to office 365 – microaoft 365 [271] => error code: caa50021 when trying to login to office 365 – microzoft 365 [272] => error code: caa50021 when trying to login to office 365 – microxoft 365 [273] => error code: caa50021 when trying to login to office 365 – microdoft 365 [274] => error code: caa50021 when trying to login to office 365 – microeoft 365 [275] => error code: caa50021 when trying to login to office 365 – microwoft 365 [276] => error code: caa50021 when trying to login to office 365 – microsift 365 [277] => error code: caa50021 when trying to login to office 365 – microskft 365 [278] => error code: caa50021 when trying to login to office 365 – microslft 365 [279] => error code: caa50021 when trying to login to office 365 – microspft 365 [280] => error code: caa50021 when trying to login to office 365 – micros0ft 365 [281] => error code: caa50021 when trying to login to office 365 – micros9ft 365 [282] => error code: caa50021 when trying to login to office 365 – microsodt 365 [283] => error code: caa50021 when trying to login to office 365 – microsoct 365 [284] => error code: caa50021 when trying to login to office 365 – microsovt 365 [285] => error code: caa50021 when trying to login to office 365 – microsogt 365 [286] => error code: caa50021 when trying to login to office 365 – microsott 365 [287] => error code: caa50021 when trying to login to office 365 – microsort 365 [288] => error code: caa50021 when trying to login to office 365 – microsofr 365 [289] => error code: caa50021 when trying to login to office 365 – microsoff 365 [290] => error code: caa50021 when trying to login to office 365 – microsofg 365 [291] => error code: caa50021 when trying to login to office 365 – microsofy 365 [292] => error code: caa50021 when trying to login to office 365 – microsof6 365 [293] => error code: caa50021 when trying to login to office 365 – microsof5 365 [294] => error code: caa50021 when trying to login to office 365 – microsoft 265 [295] => error code: caa50021 when trying to login to office 365 – microsoft w65 [296] => error code: caa50021 when trying to login to office 365 – microsoft e65 [297] => error code: caa50021 when trying to login to office 365 – microsoft 465 [298] => error code: caa50021 when trying to login to office 365 – microsoft 355 [299] => error code: caa50021 when trying to login to office 365 – microsoft 3t5 [300] => error code: caa50021 when trying to login to office 365 – microsoft 3y5 [301] => error code: caa50021 when trying to login to office 365 – microsoft 375 [302] => error code: caa50021 when trying to login to office 365 – microsoft 364 [303] => error code: caa50021 when trying to login to office 365 – microsoft 36r [304] => error code: caa50021 when trying to login to office 365 – microsoft 36t [305] => error code: caa50021 when trying to login to office 365 – microsoft 366 ) https://clipperroutesevere.com/kdjbw4ywu?key=a54852e5dee5f9fa314d768d692142d1 </h1> </body>