Looking for a report listing all machines that use the domain administrator account

Looking for a report listing all machines that use the domain administrator account

I need to change our built-in domain admin account password, so I would like to get a list of every server that's logging in with that account. When I run user logon reports for Administrator, I get over 130,000 logs, mostly just domain controller activity. Is there any specific report I can run to see which servers Administrator is used in?

                New to ADSelfService Plus?