Hello

I have one host webmail.example.corp, with few mail domains whit it's own imaps. An example office.example.corp with it's own imap (imap.office.example.corp) and example.corp with it own imap (imap.example.corp)

How can specify imap to login, over FQDN of login user

An expamle if user as login user@office.example.corp roundcube need to login to imap.office.example.corp if user login as user@example.corp roundcube login to imap.example.corp

Thanks