Tuesday 29 March 2016

Microsoft: Amended Exchange Mailbox Quota Not Taking Effect Immediately


After I have increased the mailbox quota of an user's mailbox, it will not take effect immediately. It will take about 1 hour for the new quota to be applied.

The only way to get the quota to take effect immediately is to restart the store service. However, that will kick all users out of Exchange.

This is by design. Exchange caches a lot of information, including permissions and mailbox limits. That cache is flushed every couple of hours. While the time of the cache can be reduced it is not recommended because it will have an impact on the performance of the server. The more users you have the bigger the impact.

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