Adding user to Activity Directory Group doesn't reflect on Sharepoint 2010 Security Group based on that Activity Directory Group

Dear All,

I'm having a problem with the SharePoint 2010 Security Group based on Activity Directory Group.

This is the scenario: I have a SharePoint security group that contains an Active Directory group. A user that already belongs to the active directory group correctly log on. However when I add a new user to the active directory group then the new user is unable to log on to Sharepoint Site Collection.

It looks like SharePoint does not refresh it's group membership mapping to reflect that this new user is now a member of that active directory group and then for the Sharepoint Group.

There is any Service to run/schedule?