Outlook authentication error 5.7.8 - Microsoft Community


5.7.8 bad username or password (authentication failed). error code -17900

 

accounts have been accessing years via ms outlook on mac started doing today. 

 

two mac.com addresses - have rebooted - have cleared keychain - have double checked settings - checked latest updates mac os x , office - have logged accounts via web , 1 of them via mac mail - in outlook (office 2011) - both giving errors if cannot accessed using software. (similar yahoo is, suspect, different question entirely. 

 

macbook pro 2011 - macos sierra 10.12.5 - office 14.7.5 (170531)

 

the problem today specific imap.mail.me.com , smtp.mail.me.com accounts - aol account, isp account, , private exchange account working. isp account give errors suspect because computer , phone cannot updating simultaneously. problem me.com has been ongoing since @ least morning , cannot send or receive using outlook.

i have tried using .mac instead of .me - think apple change few years ago use .me now. ( https://support.microsoft.com/en-us/help/2648915/microsoft-outlook-for-mac-compatibility-with-apple-icloud ) , tries delete folders - perhaps recreate them. 

i tried using time machine roll main identity 15th - trigger database rebuild. 

this started sometime on june 16th despite no changes made on end. 

perhaps first step giving using ms software. 

two-factor authentication turned off on account. 

hello matt,

based on description, using 2 email account on outlook. 1 icloud account , other 1 exchange account. since exchange account works fine, outlook client should work normally. did try generaling app password icloud account? delete icloud account , using app specific password re-add outlook mac, work?

generate app-specific password

sign in apple id account page.
in security section, click generate password below app-specific passwords.
follow steps on screen.
after generate app-specific password, enter or paste password field of app normally.

best regards,

alison



Office / Outlook / Mac / Office 2011 for Mac



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