We are running Exchange 2007 for roughly 400 clients. We are having a problem when we configure IMAP for external clients. We have an account setup to use for outgoing mail, through our exchange server, for port 587.
The problem is that we are not quite sure where to configure the permissions for this account. Right now, it will only work if the account we use for outgoing is part of the domain admins group. Even the administrtor account does not have the required permissions.
Obviously we can't have a domain admin account being used for this, so the outgoing account needs to work with standard user permissions.
I'm sure there is some information I didnt list that may help solve this problem, so please let me know what other info I need to post.