Correcting a Community User that is related to the wrong Contact record

Locate the Contact record that was incorrectly assigned

1. Navigate to the Contacts (or Students) tab.
2. Click on the Contact record that should be removed.
3. Click on Disable Customer User

4. Review the message that appears and then select Disable Customer User.

Locate the correct record that should have a Community record.

1. Navigate to the Contacts (or Students) tab.
2. Click the Contact record that should have a Community User.
3. Click Enable Customer User. 

4. This will take you to the New User page.
5. Select the appropriate User License and Profile.
6. Make sure an Email has been specified.
7. Save your changes.
8. If you have Communities configured, a message will display:

9. Click Ok.