Merge user accounts from two different schools

Community Novice

One of our instructors received an email from Canvas, saying, "An account has been created for you at, but you already have a Canvas account. If you would like to merge them together, click here."

Apparently, this user also has an EWU canvas account.

The instructor would like to merge both accounts. Is this possible? And if it is, is this something that we can do, as WSU local system admins? Or is this a request that must be performed by Canvas/Instructure staff?