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KevHal's avatar
KevHal
Iron Contributor
Jun 17, 2022

AVD Heartbeat threshold error

Hi, We recently moved a client from Citrix to AVD. We believe we've got them settled but we have a constant battle with them stating they get disconnected.  The client referenced that Citrix seems t...
NelsonRosa's avatar
NelsonRosa
Icon for Microsoft rankMicrosoft
Jun 20, 2022

KevHal 
hello, 
do you have the required URLs whitelisted?

you need to whitelist these URLs on session host side:

Azure Virtual Desktop required URL list - Azure | Microsoft Docs

 

an these on client side:

Azure Virtual Desktop required URL list - Azure | Microsoft Docs

 

these URLs need to be whitelisted on all firewall, proxy, 3rd party AVs, ...
Proxy server guidelines Azure Virtual Desktop - Azure | Microsoft Docs

 

Many times this error is caused by the AVD traffic being filtered or high RTT:

Troubleshoot Azure Virtual Desktop connection quality | Microsoft Docs

 

hope this helps.

 

 

  • KevHal's avatar
    KevHal
    Iron Contributor
    Jun 21, 2022

    NelsonRosa 

     

    HI,

     

    Thanks for the reply, yes they are all whitelisted, the event log shows that all URL's are accessible.

    We saw it a lot more yesterday, can't really work it out or is it just a connection quality issue from the end user.

     

    Thanks.

    • LotharNP's avatar
      LotharNP
      Copper Contributor
      Feb 28, 2023

      KevHal 

      Hi, did you ever find a solution?

      We're experiencing exact the same issue in our environment.

       

      Best Regards

      Lothar

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