By default, the Encryption Management Server Verified Directory service runs on port 80. By default, this service is disabled.
If you wish to enable the service you will first need to import a Verified Directory Key from the Keys / Organization Keys page of the administration console. Please see the section Importing the Verified Directory Key in the Administrator's Guide for details.
If you try to change the port that the Verified Directory service uses to port 443 (https) you receive the following error and cannot save the change:
The Port field's value, 443, is either not a number, a number outside the range of acceptable port numbers, conflicts with another port in use, or is a port reserved by the system.
The Web Email Protection service is configured to use port 443. The conflict arises even if the Web Email Protection service is disabled.
Symantec Encryption Management Server release 10.5 and above.
From the administration console, change the port that the Web Email Protection service uses:
You can then navigate to Services / Verified Directory and change the port to 443. Also enable the SSL option.