We just migrated from exchange 2010 to exchange 2016. Move mailboxes and all mail is flowing correctly. What I’m having issues with is some cell phones are not being able to verify accounts and sync up with Exchange server after the migration.
Most users are fine and cell phones sync up and there email flows to phones. But I have 3 users that they will not connect to server, get error message “unable to verify account”.
All have the correct settings, and all users can log in and access OWA webmail.
I have deleted accounts on phones and recreated till blue in the face with no luck. Restarted phones and server with no luck. Restarted the Exchange AutodiscoverAppPool with no luck. Deleted the phones from Exchange server and tried to recreate account with no luck. Tried about every combination of phone exchange account setup with no luck.
Not getting why these 3 users will not connect to server as the other 10 users had no problems after the migration. And all work fine before the migration.
Any help or suggestion for this issue?
Thanks in Advance.