Screen sharing clashes with VPN?

Question

While connected through VPN screen sharing fails with "We can't connect you to the presentation" (macOS, Viscosity/OpenVPN).

I'm not seeing any errors in the Console from Skype for Business. I've experienced this for weeks and months but only just now figured out that it's caused by a VPN connection.

I'm on Office Insider Fast for Skype for Business and thus running 16.3.241.

Side note: I don't need VPN to access the "Skype server" but I have it on for other connections to my employer.

kam foo aw · Answer

Hi Paul.&nbsp; Can you please update to the new insider fast build 16.4.203 and report the issue?&nbsp; Then we can get the log files to see what's happening.
&nbsp;
Thanks,
Kam

paul muller · Answer

I'm on 16.4.203 now. Where are those log files stored? Is there a way to maybe increase the log level beforehand to provide more insight?

kam foo aw · Answer

Hi Paul.&nbsp; You can find the log files here:
~/Library/Containers/com.microsoft.SkypeForBusiness/Data/Library/Logs/com.microsoft.SkypeForBusiness
&nbsp;
You can report the issue via Help/Report an issue... too.
&nbsp;

paul muller · Answer

Yesterday for the first time in months it worked even with VPN on. However, I wasn't able to reproduce my luck today. So, I'm no longer so sure if VPN really is the decisive factor. Anyway, here all the RDP related errors from the log file:&nbsp;07:26:34.364 00007fff95fba3c0 ERROR RDPINTEGRATION encwin32dskp.cpp:187 Curtain mode not available hr[0x80040154]
07:26:34.372 00007fff95fba3c0 ERROR RDPINTEGRATION RdpGfxEncoder.cpp:269 Provider is not a hybrid provider hr[0x80004002]
07:26:34.389 00007fff95fba3c0 ERROR RDPINTEGRATION monconfig.cpp:359 Monitor config 0 left 0, top 0, right 2559, bottom 1599, scaling 2.000000
07:26:49.906 00007fff95fba3c0 ERROR RDPINTEGRATION CAppSharingSharerChannel.cpp:348 Close hr Code:0
07:26:49.906 00007fff95fba3c0 ERROR RDPINTEGRATION CAppSharingSharerChannel.cpp:343 Has been disconnected
07:26:49.910 00007fff95fba3c0 ERROR RDPINTEGRATION TsSystemPalMac.cpp:2194 HRESULT PAL_System_ThreadFree(HANDLE): Invalid Condition Handle
07:26:49.910 00007fff95fba3c0 ERROR RDPINTEGRATION thread.cpp:395 Failed to free thread hr[0x80004005]
07:26:50.004 00007fff95fba3c0 ERROR RDPINTEGRATION CAppSharingSharerChannel.cpp:343 Has been disconnected
07:29:10.496 00007fff95fba3c0 ERROR RDPINTEGRATION encwin32dskp.cpp:187 Curtain mode not available hr[0x80040154]
07:29:10.497 00007fff95fba3c0 ERROR RDPINTEGRATION RdpGfxEncoder.cpp:269 Provider is not a hybrid provider hr[0x80004002]
07:29:10.507 00007fff95fba3c0 ERROR RDPINTEGRATION monconfig.cpp:359 Monitor config 0 left 0, top 0, right 2559, bottom 1599, scaling 2.000000
07:29:21.760 00007fff95fba3c0 ERROR RDPINTEGRATION CAppSharingSharerChannel.cpp:348 Close hr Code:0
07:29:21.760 00007fff95fba3c0 ERROR RDPINTEGRATION CAppSharingSharerChannel.cpp:343 Has been disconnected
07:29:21.763 00007fff95fba3c0 ERROR RDPINTEGRATION TsSystemPalMac.cpp:2194 HRESULT PAL_System_ThreadFree(HANDLE): Invalid Condition Handle
07:29:21.763 00007fff95fba3c0 ERROR RDPINTEGRATION thread.cpp:395 Failed to free thread hr[0x80004005]
07:29:21.855 00007fff95fba3c0 ERROR RDPINTEGRATION CAppSharingSharerChannel.cpp:343 Has been disconnected
07:37:53.354 00007fff95fba3c0 ERROR RDPINTEGRATION rdpencviewctrl.cpp:278 The client is already disconnected!
07:37:53.354 00007fff95fba3c0 ERROR RDPINTEGRATION CAppSharingViewerChannel.cpp:338 Disconnect hr Code:1
07:37:53.354 00007fff95fba3c0 ERROR RDPINTEGRATION CAppSharingViewerChannel.cpp:327 Has been disconnected
07:37:53.355 00007fff95fba3c0 ERROR RDPINTEGRATION TsSystemPalMac.cpp:2194 HRESULT PAL_System_ThreadFree(HANDLE): Invalid Condition Handle
07:37:53.355 00007fff95fba3c0 ERROR RDPINTEGRATION thread.cpp:395 Failed to free thread hr[0x80004005]
07:37:53.355 00007fff95fba3c0 ERROR RDPINTEGRATION TsSystemPalMac.cpp:2194 HRESULT PAL_System_ThreadFree(HANDLE): Invalid Condition Handle
07:37:53.355 00007fff95fba3c0 ERROR RDPINTEGRATION thread.cpp:395 Failed to free thread hr[0x80004005]
07:37:53.452 00007fff95fba3c0 ERROR RDPINTEGRATION CAppSharingViewerChannel.cpp:327 Has been disconnected&nbsp;

kam foo aw · Answer

Hi Paul.&nbsp; The snippet does not have enough information.&nbsp; A few questions:
&nbsp;
1.&nbsp; Does the desktop sharing work without VPN?&nbsp; In configurations where the edge server is enabled externally, desktop sharing will work with VPN.
2.&nbsp; If you experienced the desktop sharing does not without VPN, is it 100% failure?
3.&nbsp; Do you have other clients such as SFB Windows or Lync Mac to try with the VPN connection?
&nbsp;
We have tested with different VPN.&nbsp; We don't have the specific VPN that you have.

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Screen sharing clashes with VPN?

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