I develop an archiving app that uses the retention date to keep track of archived messages. At a particular client install, we're getting intermittent 53275 errors ("Required User Database rights not granted") when executing the SetTimestampRequest method. It occurs every so often for a particular user, but not on every run, and not always for the same user.

Anyone have any idea why the error occurs?

The client uses GW 8.0.2.