Hi Abrar,
Below is the landing page for Encryption Management Server
https://support-prod.symantec.com/en_US/encryption-management-server.62369.html
And Encryption Desktop (PGP)
https://support-prod.symantec.com/en_US/encryption-desktop.62377.html
This pages have How To articles, Documentation and Troubleshooting articles etc, almost everything to start with.