I have one user whose out of office is not working. He has set it up in Outlook with no issues.
What I have tried so far
1. Setting up the OOF in OWA as well
2. Setting up OOF with and without date ranges
3. Moved the users mailbox to different mailbox database
4. I ran the [Exchange Web Services synchronization, notification, availability, and Automatic Replies.] test on www.testexchangeconnectivity.com
and it was successful
What further things can I do to troubleshoot this please.