On a macOS Big Sur computer installed with Symantec Encryption Desktop and Symantec Endpoint Protection, the messaging function of Symantec Encryption Desktop may not work.
Symantec Development is aware of this issue and is currently working to resolve.
Please refer back to this article for updates, or contact support for more information.
The following are useful articles when working with macOS Big Sur and PGP Encryption Desktop 10.5 MP1:
207386 - Deploying PGP Encryption Desktop with MDM deployment settings on macOS (Symantec Encryption Desktop)
207397 - How to allow system extensions and configure MDM profile on macOS Big Sur 11.x with PGP Encryption Desktop (Email Encryption and Virtual Disk)
207391 - Configuring SSL/TLS for email communication for the Mail app with macOS Big Sur/macOS 11 and PGP Encryption Desktop