Active Directory Design and Sizing question

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Our university� utilizes Active Directory for our students (approximately 10,000)� and we are being to plan to provide more role based security for these clients such as SharePoint and other AD integrated solutions.

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We need to provide access to AD enabled resources for just authorized advisors and counselors. We are thinking about creating a security group for each student for providing access for their academic (major/minor/program, etc advisors) and professional counselors. Therefore each student security group would have and average of 3-4 councelors.

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The counselors would belong to possibly several hundred of these AD student security groups since they will advisor multiple students. These security groups are easily automated from our student information system and do not change that much and are mainly when the students change major/minor or enroll ...