I have a problem with AD authentication. When I add a user to an AD group the user gets instant access. However if I remove a user that user continues to have access till the following morning. I found the only way to immediately cut access is to do an iisreset but obviously this isn't a practical solution. Just wondering if this behaviour is normal. Incidentally I have tried reducing the token timeout. It makes no difference nor does getting the user to logout and log back in. I don't seem to remember having this problem in 2007. It's only happening in SP 2010.
Try to do User Profile Synchronization and run Set-SPProfileServiceApplication cmdlet with
to delete users that were deleted from AD.