If the migration is halted due to timeout issue when accessing the on-premises System Manager, do the following:
Cause
The user is migrated, but the routing updates are not complete. These steps update the on-premises Avaya Aura® to ensure calls to the user route to Avaya Aura® Private Cloud.
Solution
Procedure
Check the workflow logs to see the failures.
Uncheck the Delete on Unassign from User or on Delete User check box for the station and the agent profiles.
In System Manager, delete the on-premises user.
Update the on-premises Dial pattern for that station to send calls over the tie trunk to the cloud.
To update the dial pattern, click Elements > Routing > Dial Pattern on the System Manager web console.