Outlook 365: Fix “Outlook Data File Has Reached the Maximum Size”

What to do when you get a warning that your Microsoft Outlook mailbox is over its size limit.

January 4, 2019 · 1 min · 77 words · Vanessa Day

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In some cases, administrators may grant you more space if you contact them.

Items in the Personal Folder do not count toward your quota.

Of course, its best to keep things tidy and clean out some of the things youll never need.

To clean out your mailbox, take these actions.

Option 1 Cleanup Tool

Note: These steps are for the Windows version of Outlook.

This feature is not available in the macOS version.