You wish to use Encryption Desktop Email encryption with Citrix XenApp Server.
To enable access to the Encryption Desktop Email feature through Citrix XenApp, make sure that you publish the following applications through the delivery group:
When users access the published Encryption Desktop application for the first time, they will be prompted to enroll. This is a mandatory step to gain access to the Encryption Desktop Email feature.
Following enrollment, users must launch the published Microsoft Outlook application and then configure their email account.