Hello,
Thank you so much for posting here.
According to our description, the GPO for mapped drives is sucessfully applied on OS version 1909 Windows 10, but failed to get applied in 2004. So sorry that we do not have the environment to do the test now.
Could the shared folder be accessed?
Since it failed to get applied in 2004, have we checked the gpresult report on the problematic machines? Is there any error message? To check the report, please follow the below:
For user configuration:
Logon one client with domain user account who is within the OU linked by the GPO.
Create a new folder in C drive named Folder.
Open CMD, type gpresult /h C:\Folder\report.html and click Enter.
Open report file to check the policies under User Details.
Besides, the article below is for an older version of Windows 10 but the workaround should still work. We could kindly have a check whether it helps.
https://learn.microsoft.com/en-us/troubleshoot/windows-client/networking/mapped-network-drive-fail-reconnect
Best regards,
Hannah Xiong
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