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I'm in the process of migrating an existing SBS 2011 Standard server setup to a new Dell PE R530 with Server 2016 Standard w Essentials Role. In addition to the SBS 2011 Standard physical server, I also have an existing VMware VM running Server 2008 Standard R2 setup as an additional DC in the same AD simply for redundancy. SBS 2011 Standard is certainly holding all FSMO roles. Replication is working fine between both existing DCs and AD health has been checked with dsdiag and netdiag.
My question is about the process to add the new physical Server 2016 Standard server as an additional DC. I know to assign a static IP and assign DNS on the new server and point to the SBS 2011 Standard IP. Should I also point the secondary DNS to the existing additional DC that's a VM on the new server before I run DCpromo (by adding the DC role with server manager). The new server is currently joined to the domain and I'm logged-in as the domain admin.
I'm following the migration document for SBS 2011 Standard to Server 2016 but my environment simply has an additional DC already. SBS 2011 Standard DNS points to itself and the other existing DC. And the VM DC has DNS pointing to itself and then the SBS box for secondary DNS.
Thanks for any input.
Understand about not disabling the FW.
I'm currently using SBS 2011 Standard for RWW connections. I presume the existing RWW will continue to function until I modify my external firewall to point 443 to the new Server 2016 server and it's RWW setup in the Experience Role for 2016. When I transfer FSMO roles, will the old RWW stop working? I don't think they're related but I don't know about dependencies.