Unable to Publish Applications - Unregistered in Studio but Servers Are Registered with Delivery Controllers

[Dave Ward1709163915]

So, I have a weird one I have never seen before. 

 

I have built two Servers into the mix to host some published apps only. I have checked the even logs and both the Delivery Controllers and VDA both confirm that the Servers are registered.

 

However, when I go to create a Machine Catalog and select the Servers it says that they have never registered with a Delivery Controller and appear as Unregistered once the Catalog is created. If I move onto the next step and create a Delivery Group and try and add applications it says "There are no powered-on machines that can be browsed, and you cannot (or do not have permission to) power on a machine". Machines are powered on and running and ping Test-NetConnection confirm communications are up and talking.

 

Anyone got any ideas how to get these Servers to appear as Registered and enable them to publish apps.

[James Kindon]

I am pretty sure this can happen if your catalog functional levels are out of whack with your installed version of the VDA. They will communicate, the event logs will show that they can all talk, but the machines won't register