Authorize attribute

Need help on this authorize code开发者_开发百科 to define a specific sub group in my controller.

[Authorize(Roles = "RABEE\domain user accounts\zam gas industry\california\domain local groups\ZamReader")]

RABEE is the domain name that is why I have \ Group Name i have added users is: ZamReader

what I am doing wrong?

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Are you using Active Ditrectory? If so, make sure that your using a "Security Group" not a "Distribution Group".