how to browse the plesk database

[Michael Wartman]

i was trying to readd a mail account that had previously been on the system. when i go through the control panel it tells me "Mail account support already exists in this domain.". it doesn't exist in mailenable. i did some searching and it advises to search the database for the entry. however, i'm not sure exactly where the database is stored or how to access it. from the browsing i've done of mssql and mysql, it doesn't appear to be in either of those, unless i'm overlooking it which is entirely possible.

so, how do i search the plesk db for these stray entries?