I am having the issue of imap working for some users and not others. I have for instance 2 users both accounts the same. One account I can link via imap the other I can not. Both have the same group memberships, both are in the same post office. Everyone has imap access I have no restictrions set. Any idea where I should begin to look. The message I am receiving on the account the can get in is: user does not exist.