H202 Error after QB Migration to New Server (Multi-User, Domain, Server, Non-Domain PCs, Virtualized)

We are doing a QuickBooks migration from single computer (Windows 10) hosting QuickBooks as a "server" (in a Workgroup - Computer Name = QB) to a new server (Server 2019) virtualized on a new domain setup. Currently the accounting team is connecting to QuickBooks through a mapped drive to the computer's name (QB) in the same subnet. The accounting team computers are not on a domain yet. First we verified data on all the company files then moved just the company files over to the new server. We then re-mapped the end users drive to the new server using a CNAME that points to the new accounting server. Each end user computer DNS is pointing to the new domain controller so it can reach. Every time we opened a company file off the new server with the "open file in muti-user mode" we would get this H202 error. We have tried everything in this thread https://quickbooks.intuit.com/learn-support/en-us/open-programs/how-to-fix-error-h202-and-h505/01/18... and nothing is working. We did a ton of research and implemented tons of fixes, changes, etc. and still nothing is working.