IWDC -"Icewarp settings" function enabled afterwards?

Our Icewarp server is setup correct for smart discover but the client don’t find it.

I think teh reason for that is our relay server which isn’t Icewarp and the mx record is for the relay. But the Icewarp server is our internal server behind the relay and we don’t translate the domain.

So can I enable the Icewarp settings manually after the IMAP accounts are created?

It’s solved.

The problem was the installer of the Icewarp server didn’ setup the win2k8 firewall properly so the port was blocked. Some clients showed a proxy error message box, but not all clients.