Good Morning.
I am having the weirdest issue.
Site 1 has been migrated from server 2003 sbs to 2012 R2 Standard. Site 2 also has a 2003 server with a newly installed 2012 R2 Standard server.
Site 1 migrated no problem and we decommissioned the old server. Site 2 is having issues. It can join the domain but cannot be promoted to a domain controller. When attempting it fails and the log says invalid username and password or credentials. I am using the domain admin account as the previous Site 1 migration. Here is where its a mystery to me.
Both sites have sonicwall firewalls. Site 1 can ping by name and IP and access file shares on the new Site 2 server. Site 2 can ping by name and IP Site 1 but cannot browse file shares from site 1. All servers DNS point to each other. All servers can
ping internally to each subnet.I can however access files from Site 1 from Site 2 if I use just the IP of the server.