When you start a Citrix Session and open an explorer window the following message appears.
Citrix Receiver – Security Warning.

This message is caused by the Citrix Receiver. The Receiver is trying map the local drives and is trying to access them.
In case of a writable profile this is not a big issue. If you choose to Permit all access the settings are saved in the registry thus in the profile. When working with mandatory profiles these setting will not be preserved. Also in a ThinClient environment this behavior is not wanted. Because this will generate some helpdesk calls. Continue Reading