Tuesday, February 1, 2011

Lync Server 2010 Application Sharing Error: "Sharing failed to connect due to network issues"

I hit another small bump in the road with Lync Server 2010. IM was working in the test environment but I was unable to do any application sharing or screen sharing with folks. I found out from Microsoft that this is a peer to peer connection... I assumed everything was proxied through the server so was focusing on the ports on that server.

I had a Group Policy firewall rule that allowed the old R2 communicator client in/out the firewall and forgot to update it with the new client file location. Instead of a rule allowing "c:\program files\Microsoft Office Communicator\communicator.exe" - I added one to allow "c:\program files\Microsoft Lync\communicator.exe"

After a gpupdate /force on the server and a gpupdate /force on my client machines, it worked.


Anonymous said...

can you just give a brief rundown of how you create the group policy.

i have the same problem and its bugging

Craig said...

Just use the "Windows Firewall with Advanced Security" spot in your GPO.

Computer Configuration -> Windows Settings -> Security Settings -> Windows Firewall with Advanced Security

From there, create a new inbound rule for your Lync Client. Make sure to type in the exact location of the Lync client on your client machines.