Insufficient permissions

For users to access a remote resource through the Remote Desktop Services, formerly known as Terminal Services, you must assign them the Logon Through Remote Desktop Services right. Otherwise, the users will receive an error when they try to connect to the remote resource. To make sure you have the proper permissions assigned, complete these steps on the remote server:

1. Open the Group Policy Object Editor by entering the GPEdit.msc command at the Windows Run prompt
2. Navigate through the console tree to Computer Configuration \ Windows Settings \ Security Settings \ Local Policies \ User Rights Assignment
3. Double-click on Allow log on through Remote Desktop Services
4. Add the necessary groups and click OK