I changed the password on the MS SQL sa password outside of Plesk. That was a mistake. I went into Plesk to change the sa password that it uses to connect to MS SQL, but it asks for Old Password. Apparently I don't remember the old password correctly, and Plesk fails to update its sa password because of this. I figure Plesk is actually trying to talk to MS SQL and change the sa password directly, hence it asking for the old password. So I tried putting in the current sa password (in SQL) as the Plesk old password, but it still fails to connect. I think it's still using the original sa password that I set up when I installed MS SQL.. the password that I cannot remember. Is there a hidden Plesk utility to change what it "thinks" the old password is, or to straight-up change the sa password that it uses without having to supply the old password? Until I resolve this, Plesk can't interface with my MS SQL and I have to do all database tasks manually outside of Plesk.