Problem:

When the Powershell script is run on the local computer, to add the P: mapped drive and credentials, it all completes correctly but the mapped drive may not be visible in Explorer, to the end-user.

Diagnose:

Open the command prompt as Administrator and change to the mapped drive.  If it appears when using the elevated Administrator prompt only then the following will fix the problem.

Solution:

1. In Registry Editor, locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
2. Right-click Configuration, select New, and then select DWORD (32-bit) Value.
3. Name the new registry entry as EnableLinkedConnections.
4. Double-click the EnableLinkedConnections registry entry.
5. In the Edit DWORD Value dialog box, type 1 in the Value data field, and then select OK.
6. Exit Registry Editor, and then restart the computer