You will need SysinternalsSuite to make this work.
1. Open an elevated cmd.exe prompt (Run as administrator)
2. Elevate again to root using PSExec.exe: Navigate to the folder containing SysinternalsSuite and execute the following command
psexec -i -s cmd.exe
You are now inside of a prompt that is nt authority\system .The -i is needed because drive mappings need to interact with the user
3. Create the persistent mapped drive as the SYSTEM account with the following command
net use P: \\servername\sharedfolder /persistent:yes
WARNING: You can only remove this mapping the same way you created it, from the SYSTEM account. If you need to remove it, follow steps 1 and 2 but change the command on step 3 to net use P: /delete.
NOTE: The newly created mapped drive will now appear for ALL users of this system but they will see it displayed as “Disconnected Network Drive (P:)”. It shows disconnected but it will work for everyone.