ALERT: network shares not visible in file explorer

Harm_Veenstra 

Thanks, I finally solved it.
The useful solution for me is this which I report below (taken from your link):

Detail to configure the EnableLinkedConnections registry entry

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.