I'm nearing the end of a complete domain migration, all the computers and servers have been moved over except for the dreaded ERP & SQL Server. I inherited these things when I came into this environment and have tried my best to steer very clear of it (if its not broken, don't fix it mentality) and unfortunately there is no senior or anyone else here that was around when it was initially configured. No documentation either, per usual.
Since I'm not really a DBA outside of mysql/postgres I am curious as to where to look within Microsoft SQL to check if any domain accounts were used anywhere, or any links to old domain locations are present.
Microsoft SQL 2014 & 2017 (different servers), on Windows Server 2012 R2
Any help would be greatly appreciated.