Quite simply, how often does the wswin_check_lm_group process check group membership? Is it every time a rule referencing a group is triggered, or does it keep a cache and update it every X minutes? If the later is this configurable? Also, is there a way to add timestamps against errors it logs in cache.log? Paul Cocker TNT Post is the trading name for TNT Post UK Ltd (company number: 04417047), TNT Post (Doordrop Media) Ltd (00613278), TNT Post Scotland Ltd (05695897),TNT Post North Ltd (05701709) and TNT Post South West Ltd (05983401). Emma's Diary and Lifecycle are trading names for Lifecycle Marketing (Mother and Baby) Ltd (02556692). All companies are registered in England and Wales; registered address: 1 Globeside Business Park, Fieldhouse Lane, Marlow, Buckinghamshire, SL7 1HY.