here's a little update on this:
- Connection to the local Domain Controller from Horizon Cloud still doesn't work, but i can join a Azure Test VM into my local Domain without any problems
- I deployed a Server 2016 VM on Azure and configured it to be an additional Domain Controller for my local AD. After i did this i could register my local AD on Horizon Cloud with my local domain bind / domain join Accounts. From there i could finally set up the Cloud Pod and everything worked perfectly
So that's a workaround for now and definitely not the final solution. I'm still trying to figure out what the problem with the AD join via the IPSEC Tunnel ist and why it's not working as expected.
The different Active Directory deployment options are listet here:
The VMware recommended one is Option 6. So i'll try to set this up as well but event if that workes, i'll want to get option 1 running as well.
I still appreciate any help from your side.