If the record is linked to a NetCommunity account, the password can be changed in NetCommunity.

When the Online Campus Community plug-in is installed, the passwords for Faculty Access for the Web are stored in Security in EE. The passwords can be changed in Online Campus Community, and the changes will filter down to the Setup System Security in The Education Edge.

How to change username or password for a user linked to NetClassroom or FAWeb and NetCommunity

Additional Resources
Password is blank on Education Edge record following upgrade to Blackbaud NetCommunity 7.1