1. after Exchange server restarted IMAP4 and IMAP4BE services could not start because "binding already in use 0.0.0.0:9993".
2. netstat shows established connection from one of my DC (DCxxx:msft-gc).
3. net stop/start NTDS on DCxxx to free 9993 port on Exchange.
4. Services IMAP4 and IMAP4BE started up but telnet to 143 and 993 ports fails.
+Windows Firewall configured to allow all inbound connections.
5. Trying to restart IMAP4 service - "Service has started successfully"
6. Trying telnet o Exchange 993 - get MSExchangeIMAP4 id 1011 "The imap4 Server's Online status has changed to FALSE."
What does it means? And how to fix it without reboot?