Question : How to raise 2 GB mailbox limit in Exchange 2007?

I have a Exchange 2007 installed on a Windows Server 2003 R2.

I'm trying to understand how to raise the 2 GB limit on a specific databases.

One of my custumers mailbox issues this warning e-mail:

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Your mailbox is almost full.

2012MB2048MB
Current sizeMaximum size

Please reduce your mailbox size. Delete any items you don't need from your mailbox and empty your Deleted Items folder.
Sent by Microsoft Exchange Server 2007
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Based on which database that customer is linked to it shouln't issue a warning until his mailbox is 4 GB.

I have even tried to change this specific users "Storage Quotas" but I still won't work.

What have I missed?

P.S. If you need any more info, don't hesitate to ask for it.

Answer : How to raise 2 GB mailbox limit in Exchange 2007?

i mean the configuration you did for specific user is right, but you need to restart information store service in the mailbox server that hold the user mailbox