Jan 17 2018 07:29 AM
Just this morning I am having issues connecting to my Office 365 mailbox in Outlook 2016. I have been troubleshooting a similar issue with another colleague and now it seems I've been bitten by the bug! We are in a Hybrid Exchange environment though our mailboxes have been migrated to Exchange Online. So far only 2 accounts (me and the other colleague) are having this issue, that I know of.
Outlook.office365.com works just fine.
Jan 17 2018 07:57 AM
If you suspect some issue on the backend, open a support case to get this investigated. Otherwise, try the usual tools - run Autodiscover tests internally and externally (ExRCA), go over the issues found by the SaRA tool, try crating a new profile on the affected machine(s), try running Outlook in safe mode...
Jan 31 2018 12:10 AM
I have had the same problem.
Aug 13 2019 07:04 AM
@Vasil Michev Sorry but what are:
Thanks :)