6 months since the last post here and this is still an ongoing issue. Hyper-V 2022 Standard and Veeam B&R 12.2. Same error as everyone else. Veeam will not connect even though the admin credentials are correct. Tried .\<username> and <hostname>\<username>

None of the proposed fixes work.

I cannot open a support case with Veeam because our rental license comes through a third party reseller so only they can open a Veeam support case.  All of our client backups are failing because Veeam refuses to talk to the Hyper-V server.