Is there a list somewhere? When I search for "DNS Error code: 0x00002741", all I ever find are netdiag logs. So does anyone know the meaning or can provide me with a list of error codes?
0x00002741 means the SVR record requested is invalid. Without a context to put that in, it just mean that a program is looking for a SVR record and not finding what it expected.
The most common reason to get this, as you have found, is when someone runs netdiag and the AD DC's DNS entries aren't registered correctly, a missing SVR record, or the A record it points to is missing, or one of them is corrupted, or something else entirely (such as the DNS server couldn't be contacted).