A user account that has been discovered does not show the Account Source User Type, it is a blank field.
It has been discovered, but the tool does not recognize it as a mailbox. It's confirmed that the user does have a license and a mailbox.
Task Events show the following error:
"Some of attributes of the <user_UPN> object cannot be completely transferred during this session. Reason: Unable to update the specified properties for on-premises mastered Directory Sync objects or objects currently undergoing migration. Re-run the migration task to complete attribute transferring."
To resolve the issue, please validate that on-prem ADconnect is not running, so source tenants Azure objects are not in use/locked state. Then re-run the Discovery task.
If Discovery was used to populate the whole source tenant's accounts and only a handful of accounts were affected, it's recommended to create a simple CSV file of these accounts with the header:
UserPrincipalName,type
and populate lines in the following format:
user1@domain.com,user
user2@domain.com,user
Then re-run the Discovery task using CSV file.
