This can happen when your Windows Security Token bloat has struck:
… the problem could be minor, or relatively major. You may get weird access denied messages, applications crashing, or strange entries in your event logs. Or worse yet a SID for a group that has a ‘deny permission’ on an object could be dropped into the virtual bit bucket, allowing a user to access a resource they are not supposed to access.
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Summary of fixes for token bloat:
- Use global or universal groups instead of domain local.
- Increase the MaxTokenSize on all computers
- Convert security groups to distribution groups if they are only used for email lists.
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There is a hard-coded limit of 1,024 SIDs for the Kerberos PAC (privilege attribute certificate)
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Kerberos token size still remain to 64k in windows7 / win2008r2.
This is what UWWI did to avoid token bloat: UWWI Token Bloat – IAM – UW Information Technology Wiki.
–jeroen
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