aleols

Hi Our software collections querying AD security groups have stopped updating. They have been configured to full update every 60 minutes, some have been configured to update incremental. It does not matter if we try to manually update them. The security groups are not new, only the new objects in them. I have a few collections that does not query the security, but rather some OU's for computer objects. This seems to be working and the collections are populated with the new found objects. All newer collections we've made since we started getting this problem has been removed in case of some error stopping the rest of the updates without any success. Site server has not been rebooted. Anyone have any thoughts about where to look? Thanks! Regards, Aleksander