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On-Prem sync to cloud native
So we’ve started a process to move users from a hybrid model to fully cloud in readiness to retire the local environment. Just in testing we can move a user to an unsynced OU, and then restore in clo...
- I can think of 2 things. Modern Authentication became default from Outlook 2016 so if you have Outlook 2013 you might need to create a registry object to enable Modern Authentication. https://docs.microsoft.com/en-us/office365/enterprise/modern-auth-for-office-2013-and-2016
Also, can you double check in your tenant if it is enabled? Get-OrganizationConfig | Format-Table Name,OAuth* -Auto (see here for more information https://docs.microsoft.com/en-us/Exchange/clients-and-mobile-in-exchange-online/enable-or-disable-modern-authentication-in-exchange-online?redirectSourcePath=%252farticle%252f58018196-f918-49cd-8238-56f57f38d662
Let us know if you managed to fix it :)
If it ends up cropping up again, I would check auto discover and make sure you swung that to 365 as well.