I switched to a new Windows domain last night and things went fairly smoothly. The only remaining issue is the Veeam B&R server, where it refers to the old domain. I tried to add a new VMWare vSphere infrastructure entry and hit a snag. The login failed. I'm not sure if this is an issue with Veeam or with vCenter server, or something else.
Running vCenter Server 6.7 and Veeam B&R 9.5.