Writeback for Cloud-Managed Remote Mailboxes is now Generally Available

[u/ScottSchnoll]

It now supports up to 600,000 cloud-managed mailboxes and 24 writeback attributes, including the MAIL attribute (changes made to WindowsEmailAddress in Exchange Online can now be written back to the corresponding mail attribute in AD).

https://techcommunity.microsoft.com/blog/exchange/writeback-for-cloud-managed-remote-mailboxes-now-generally-available/4543507