In one post office, I'm getting random User DB rebuilds and well as
nwguard checks throughout the day

I then have to do a manual index routine to get the mailbox up to date.

I'm also getting mailboxes that are losing system folders (Cabinet,
Calendar). Again randomly

A Standalone GWcheck fixes the issue but then it re-apprears

Gw 8.02 HP3 on NW 6.5 SP8

Any ideas would be appreciated ?