Forum Discussion
After a hybrid migration to Exchange Online Outlook clients not switching over.
Rob Axelrod Hello, not in my comfort zone here but I've heard of an almost identical issue before where they disabled MFA (temporarily) to get it to work.
If that's not the case maybe this is applicable
https://support.microsoft.com/en-us/help/3073002/after-migration-to-office-365-outlook-doesn-t-connect-or-web-services
Rob Axelrod Hello, not in my comfort zone here but I've heard of an almost identical issue before where they disabled MFA (temporarily) to get it to work.
If that's not the case maybe this is applicable
https://support.microsoft.com/en-us/help/3073002/after-migration-to-office-365-outlook-doesn-t-connect-or-web-services
Rob Axelrod Yes I agree that for that many migrations you need a resolution, not a workaround ideally.
Did this happen on every one of the pilot migrations?
ChristianBergstrom As ever my friend, some very useful ideas. With modern authentication enabled, MFA should not be an issue, but you just never know. 