Model, Component, and Package Management > Model management > Model Explorer > Working with users and groups > Deleting principals from a database (Model Explorer)
  
Deleting principals from a database (Model Explorer)
To delete a principal:
1. Start Model Explorer.
For more information, refer to Starting Model Explorer.
2. In the left navigation pane, expand the SQL icon.
3. Expand the server that contains the database you want to delete a principal from.
4. Right-click on the database, point to Principals, then click Delete Principal....
5. In the Delete Principal dialog box, type a user or a group name in the following format:
<domain\username> —to delete a user
<domain\groupname> —to delete a group
6. Click OK to delete the principal from the database.
7. Confirm that the Principal deleted successfully message appears.