I've run through all the steps to move services from the old sbs2011 to the a new server 2019 standard install. On running dcpromo to demote the sbs2011 demote the old server I am getting an error and it doesn't complete.
The operation failed because:
Managing the network session with server2019.internaldomain.local failed
"The specified network name is no longer available."
I have run "DCDIAG /test:DNS /DNSALL /e /v" on the sbs2011 (from elevated powershell) and it is showing 1 error:
TEST: Authentication (Auth) Error: Authentication failed with specified credentials Error details: 64 (Type: Win32 - Description: The specified network name is no longer available.) - Add connection failed
Summary of DNS test results:
Auth Basc Forw Del Dyn RReg Ext _________________________________________________________________ Domain: internaldomain.local server2019 FAIL PASS PASS PASS PASS PASS PASS sbs2011 PASS PASS PASS PASS PASS PASS PASS
When I run the same test on the new 2019 server it completes with no errors.
Advice on what could be causing the issue is appreciated.
This is caused by DNS related issues on your network. When you ran .\ADHealthCheck.ps1 from chapter 10 of How to migrate SBS 2011 to Windows Server 2019 Standard, Datacenter or Essentials you must also have seen these issues and then you should have solved them.
Thanks for getting back. The test script (chapter 9 I think) shows being run on the new 2019 server, the script completes and shows no errors when run on the new 2019 server, all passes.
It was only when dcpromo failed that I ran "DCDIAG /test:DNS /DNSALL /e /v" on the sbs2011 server, this is what is showing the single fail.
I am trying to find a correct way to resolve the issue so that dcpromo completes, if not then I'll likely have to just remove the old server and fix any of the remaining metadata.