When a cmdlet is run that makes changes to a user's delegates (Set-CsUserDelegates or Set-CsUserForwarding with the -SetDelegates switch) and there are multiple delegates passed to these cmdlets, the operation may appear to hang or be slow.
This happens because SEFAUtil Server is waiting to receive a BENOTIFY from the FE pool. The Windows Firewall on the Trusted Application Server is blocking the BENOTIFY message from the FE pool because the SfB installer for the UCMA components does not open the proper ports.
There are 2 possible solutions to this problem.
- Disable the Windows Firewall on the Trusted Application Server.
- Open the proper ports in the Windows Firewall.