Microsoft SQL Server login using Active Directory Credentials
The error message is that the certificates were issued by an untrusted authority. That would be your AD domain, most likely.
A couple of workaround that you might want to try:
- This dba.stackexchange.com post suggests clicking the options button on your connection window above and adding
TrustServerCertificate=Trueunder Additional Connection Parameters. This is basically telling SSMS that yes, you know, just do it.
- If that doesn't work, this dba.stackexchange.com post suggests using runas in order to trick Windows. For example,
runas /netonly /user:domain\username "C:\path_to\ssms.exe"I've never done this with SSMS but it's worth a try, since the OP seems to be in a similar situation to you (and I trust the guy answering).
Anyway, hopefully one of those workarounds will do the trick for you.