Encryption Management Server Licensing

Hi all,

We've been using Symantec PGP Desktop for 10 users and decided to get a Symantec Encryption Management Server (PGP Universal Server). Do we need to get 10 user license again for the Management Server? I can't get any resource explaining on client-server licensing.

Besides this, we're planning to get licenses for Mobile Encryption for IOS, Android, Blackberry. Please help.

Arvin