I have a SharePoint sub web with unique permissions, within the site I have 3 SharePoint groups (Owner, Contributor and Viewers), in each of these groups I am including an Active Directory group.
Users within the group can log into SharePoint and see lists fine, however when I go to the site permissions and click 'check permissions' the user doesn't have permissions and subsequently doesn't receive alerts from the task list.
If I don't use the AD group and add users to the SharePoint group, I can see the permissions using 'check permissions' and the alerts are received.
Is there a reason why the AD permissions aren't working from a sub web - I have the same setup for a site collection and it works fine. Just not the sub web.