Please suggest a way to restrict the sharepoint site (through Central Admin) to a selected category of users (or user groups).
For example: if there are three users on the corporate intranet (A, B and C), the server administrator should be able to restrict the access of the sharepoint site to just A and C. Is there any option whereby I can achieve this? B should not be able to access the site.
Also, the user designated at site admin should not be able to override the above setting.