The tenant ID is the unique identifier for each organization's Raiser's Edge NXT or Financial Edge NXT database. When an issue is reported to Support, this field is important to confirm which database you're accessing at the time.
This can be found at the end of the web address (URL) of your Raiser's Edge or Financial Edge NXT web view.
Navigate to your NXT URL
Log in with your credentials
Once in the correct NXT web view, highlight the end of the URL starting with "...tenantid="