You can manage the size of your mailbox to improve the overall performance of Microsoft Outlook.

1. On the Tools menu, click Mailbox Cleanup.
2. Do any of the following:
   • View the total size of your mailbox and of individual folders within it.
   • Find items older than a certain date.
   • Find items that are larger than a certain KB size.
   • Archive items using AutoArchive.
   • View the size of your Deleted Items folder.
   • Empty your Deleted Items folder.
   • View the size of your Conflicts folder.
   • Delete your Conflicts folder.