Migrated from Exchange 2003 to Exchange 2010 and it broke OOO.
"Your Automatic reply settings cannot be displayed because the server is currently unavailable. Try again later."
I've read and tried some of the many solutions on the web and it hasn't fixed the issue.
I believe one of the problems is that this client's Active Directory domain name is different than their production EMail domain. (abc.com vs. def.com), and the client does not own the public domain for their internal domain name and therefore cannot obtain a third party SSL certificate. We are using a selfsigned certificate.