Outlook 2007 gets a popup instead of an email message when mailbox is over the limit

I have an Exchange 2007 SP1 server with mailbox limits on the store. I have some Outlook 2007 clients that get the traditional email when their mailbox goes over the limit. On a few users with Outlook 2007, they get an annoying popup window with mailbox cleanup tools. It keeps popping up and they need to close it to work. I know its related to the mailbox limit because when I removed the limits on these users, the popup went away. My question is why do some get an email and the others a popup. I looked at all the settings I could on the client and could not find anything. The versions of Outlook are the same to the best of my knowledge.
osiexchangeAsked:
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Redwulf__53Connect With a Mentor Commented:
This is one of those "under water" processes; you can't really be sure when the attribute is enforced exactly. Exchange re-scans the policies at certain intervals. You could have forced it by rebuilding the global address list, but in large environments this can also be time- and resource-consuming.

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Redwulf__53Commented:
There are 2 thresholds:
-Warning limit
-Blocking limit.
When the warning limit is exceeded, the user receives an a warning message as e-mail. When the blocking limit is reached however, the user cannot receive any more mail, not even the warning message. That's when Outlook gives the pop-up.
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osiexchangeAuthor Commented:
Thanks. I noticed that even after removing the restriction on the account and waiting about 30 minutes, the user still could not send anything until they cleaned and went below the limit. Then they could send after cleaning almost immediately. Is this normal? Shouldn't removing the limits to the trick?
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