• Howard i think this has an example of what you want, but i have not done this myself

    http://msdn.microsoft.com/en-us/library/ms186710.aspx

    A. Denying IMPERSONATE permission on a login

    The following example denies IMPERSONATE permission on the SQL Server login WanidaBenshoof to a SQL Server login created from the Windows user AdvWorks\YoonM.

    USE master;

    DENY IMPERSONATE ON LOGIN::WanidaBenshoof TO [AdvWorks\YoonM];

    GO

    Lowell


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