Transfer files between on premiss AD joined and Azure AD joined device. \\computername\C$ doesnt work

Question

Normally to simply and fast transfer files over the internal network i use \computername\C$ so i can copy it. The envirement is hybrid with on premiss AD and Azure AD connected.

Now i have the problem this doesnt work with devices in Azure AD, is there another method how i can simply transfer files between AzureAD devices? Or need something to be configured?

The plan is to install all devices in our network with Intune and let them Join Azure AD. But simple things like this need to work before we go further.

Azure AD is new for me Thanks in advance!

Answer 1

We manage AADJ devices using Intune. Took me quite a while to figure this out. The solution was frustratingly simple, once I found it. The issue is the Windows Firewall on the AADJ machine blocking the File and Printer Sharing ports. Open UDP Ports 137 & 138, and open TCP Ports 139 & 445. Port 445 will also allow the AADJ machine to be pinged. There is no ADMX policy for this firewall setting in Intune but there is one in Group Policy. AADJ machines can't use Group Policy, but ADMX.help has a wealth of information on what those group policies do. This is the ADMX.help link for the File and Printer Sharing rule.
https://admx.help/?Category=Windows_10_2016&Policy=Microsoft.Policies.WindowsFirewall::WF_FileAndPrint_Name_2