Hi all, According to the fine Samba manual in chapter 23: ---------------------------- To reduce the network cost of these lookups, Winbind uses a caching scheme based on the SAM sequence number supplied by NT domain controllers. User or group information returned by a PDC is cached by Winbind along with a sequence number also returned by the PDC. This sequence number is incremented by Windows NT whenever any user or group information is modified. If a cached entry has expired, the sequence number is requested from the PDC and compared against the sequence number of the cached entry. If the sequence numbers do not match, then the cached information is discarded and up-to-date information is requested directly from the PDC. ---------------------------- The problem I'm currently having could be explained by the server not updating the sequence number. Is it possible to manually expire all entries in the cache and force winbind to go direct to the PDC? "net cache" doesn't work (different cache.) I'm assuming 'wbinfo' goes direct all the time, because it returns up to date info, as does 'getent group ...' it's just Samba that's stuck with old/cached data. Thanks, Adam.