Outlook authentication failed - Microsoft Community


split thread.

the answer vague learning mac , outlook won't launch...

hi damien,

to better assist you, please provide more details situation? example, while tried opening outlook mac, nothing happens or error message generated. related screenshots better. 

on hand, please make sure outlook mac newly updated. can try opening office app (ie, word or excel) , going "help"> "check updates"> here list apps can upgraded> install outlook mac update if can see it. after that, recommeded provide detailed client version number here.

since have mentioned learning outlook mac, suggestion may involve support/admin in thread can communicate issue. 

regards,
alan



Office / Outlook / Other/unknown / Office 365 for business



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