Mailbox Migration - Exchange
I am working on a project that has the purpose of eliminating Exchange 2003. In this process, we migrate the boxes of OSvC from 2003 to 2010 version and they began to present problems a couple of weeks ago.
Example of error notification: "Logon failure: unknown user name or bad password". But, login and password are correct.
We were forced to rollback these boxes to the previous version (2003) to get them back up and running.
I need help to understand what can be done to make all these boxes work in Exchange 2010, just like they work in 2003.
The boxes are configured on a POP Server: outlook.office365.com