locked
SfB Screenshare doesn't work over VPN RRS feed

  • Question

  • When users connect to the corporate VPN endpoint (Cisco AnyConnect) and commence a SfB call, they are unable to share their screens. The recipients screens will just turn black with the error message: "We had some trouble starting your presentation. Please try again" This only occurs over the client VPN connection .

    Note :

    Screensharing works fine on the wired network
    All users are affected and we have around 270 employees
    Started around 6 months or so

    Kindly advise how to start the troubleshooting over this ?

    Friday, January 24, 2020 1:39 PM

All replies

  • Hi TechAdmin!

    What is current environment? Online or on-premise?

    Does this issue persist when you configure your VPN connection in the first time?

    According to your description, the issue seems related to your network environment.

    Please make sure that you are able to connect to the endpoints described in the link below through the VPN connection:

    https://docs.microsoft.com/en-us/office365/enterprise/urls-and-ip-address-ranges?redirectSourcePath=%252fen-us%252farticle%252fOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2#skype-for-business-online-and-microsoft-teams

    If your environment is online, we recommend you troubleshooting VPN to Office 365 Connectivity by following these ways:

    *Check VPN Software Configuration settings

    *Configure VPN for split Tunnelling

    *Proxy settings

    *Disable the wireless Network Adapter

    *Check DNS Service configuration

    For more details about it, you can refer to the following link:

    https://www.sherweb.com/blog/office-365/vpn-office-365/

    Besides, we also recommend you try to update the client version to the newest to see if this issue still persist.

    Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.
     

    Best Regards,
    Jimmy Yang

    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.
    Monday, January 27, 2020 9:36 AM
  • Hi Jimmy

    Its SFB Server 2015 Enterprise. It never worked using VPN. 

    Regards

    Monday, January 27, 2020 12:41 PM
  • Hi TechAdmin-Skype!

    What is your VPN connection? Split or full tunneling?

    You can try to check the ports for VPN traffic.

    Based on my research, Skype for Business media stream and signaling are encrypted between client and server. Because a VPN also runs encryption, this would force encrypted Skype for Business traffic to be re-encrypted through the VPN, then decrypted more than once. This could cause latency and jitter. For more details about Skype for Business Nework Planning, you can refer to:

    https://www.uc.solutions/Skype_for_Business/Skype4B_Set_Up/Skype_for_Business_network_planning

    You can try to configuration like this:

    Lync client connect to the Access Edge Server for all signaling connections when on the corporate VPN. However, Media sessions routed through the A/V Edge Server interface instead of establishing connectivity through the VPN tunnel.

    For more details about it, please refer to:

    https://techcommunity.microsoft.com/t5/skype-for-business-blog/enabling-lync-media-to-bypass-a-vpn-tunnel/ba-p/620210

    Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.

    Best Regards,
    Jimmy Yang


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.


    Thursday, January 30, 2020 5:47 AM

  • Hi,
    I am checking the status of this case. Please let us know if you would like further assistance.
    Meanwhile, if the reply is helpful to you, please try to mark it as an answer to close the thread, it will help others who encounter the same issue and read this thread.
    Thank you for your understanding and patience!
    Best Regards,
    Jimmy Yang

    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.
    Friday, February 7, 2020 8:57 AM