JoinDomain VMExtensionProvisioningError when deploying WVD (aka Conflict Error)

Deploying WVD Fails with a conflict error and when clicking for more information it presents a conflict and not much else that is useful by way of toubleshooting. Hopefully this helps someone else as it had me head scratching for a little while.. When creating the Host Pool, make sure that you haven't made the fatal error of using the Azure Active Directory Credential INSTEAD of the Local AD Domain Credential.  i.e do not use to domain join, even if it links back to the domain - this is where the conflict arrises.    Instead, use your full internal domain UPN.  Re-deploy your same configuration and you should find it goes through now without any problems. Additional findings.... Albeit my mistake above was an easy one, it does appear the error is directly linked to the domain join process. If you go into your resource groups, locate the session host and MSTSC directly to it.  Try the domain join pr

Configuring QoS for SIP / VoIP

Unless you have a true understanding of the layer protocols and technologies behind SIP, setting up QoS can actually be quite difficult, as I found out myself.

Interestingly when setting up SIP you often set the firewall port to 5060 and leave it at that, so you may simply assume that 5060 is the only required port. What you forget though, is that this is only inbound; what is going outbound?

So my personal understanding of SIP (and some wiresharking later) is that it tends to use the following protocols.

Signalling via port 5060. ALSO each line after uses upward one port.Line 2 5061, Line 3 5062 etc.
Realtime Transport (RTP) 10,000 - 20,000 varying per call.
STUN 3478/3479

So you see straight away that setting QoS to prioritise 5060 will do next to nothing on your network you need to put in three ranges. 5060-5080 (20 lines), 10,000-20,000 & 3478/3479.

All of the above only need to be UDP.

Putting these ports into QoS makes a huge difference to the quality of a call for me. I'd be interested to hear other peoples stories.


  1. Personally, I don't have much of problem with the call quality I get. Still, I think I'll give this a try to see if I can get even better quality.


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