I have one user who unable to enable OOF via Outlook. Everytime he try, will received below message:
Your Out Of Office settings cannot be display, because the server is currenttly unavailable.Try again later
He able to enable OOF via Outlook Web App.
He did test email-configuration and able to get OOF URL.
What I did so far is:
1. Disable a mailbox then create a new mailbox, open the new mailbox and enable OOF, same error occurred
2. Create a new AD account User01-1, enable mailbox, open the new mailbox and enable OOF, same error occurred
3. Use MCPMAPI to delete the corrupted OOF rules.
Others user doesn't have encountered the issue so I don't think it is the autodiscover issue.