Is there a trick to setting up the Nutanix hosting connection? I'm getting an error every time I try to connect. I can log in through the Nutanix web site to the same IP and with the same service account. Delivery Controllers are 2507CU1 clean build. Also tried installing the Nutanix plugin but have the same issue.

Are you on PC 7.5 and trying to use native PC integration?

Looks like that may be the answer. They are upgrading the Nutanix clusters tonight so I will know for sure tomorrow. Thanks @Jarian Gibson!

Just need to upgrade PC to 7.5.0.5 or higher

As it turns out, this was more than 7.5 to 7.5.0.5.. They were on a MUCH older version which I was told they met the 2507 requirements originally. I should have verified but unfortunately didn't have access at the time. They are now on PC 7.3.1.5 which does connect and I can spin up MCS machines but I don't have power management. I'm using the built-in PC hosting connector, I do have the Nutanix connector version installed but it does not connect.

Yep 7.3.x is fine. Just make use 2507 CU1 for native PC. There should be no Nutanix installation for native PC integration.

Ok yeah it's 2507 CU1 it's just odd MCS creation works but all VDA's are in unknown PowerState, and trying to add a manual provisioned / power managed VDA I get "An unexpected error" when expanding the Nutanix Cluster. Hosting connection test is successful.