Remote users don't receive warnings when dbs near quota

We have just instated mail database warning thresholds at 65 megs and quotas at 125 megs using the standard R5 quota setup. Users in the office receive the warning if they've hit the threshold when they first open their mail on the server for the day. Yet we have quiet a few remote users. It seems as if remote users who open their local mail replicas DO NOT receive warnings when their databases hit the threshold. They have no idea when they are getting close to the quota. Is this a true statement? If so, it defeats the warning/quota for our remote users who typically are the pack rats. Any help here? Thanks!

Quota warnings/thresholds are set on the server, and are triggered by server events. Local users will not be warned.