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Office 365 - Size Limits and Retention Periods

Faculty, staff and students are responsible for managing their own mailboxes, including retention of email in accordance with the records retention schedule. If your mailbox is nearing the storage limit, you will need to delete items from your account. Items in the Deleted Items folder will then need to be purged to reduce the size of your mailbox.

Determine how much Mailbox storage space you are using

  1. Open a Web browser
  2. Log into your account at
  3. Click Outlook
  4. Click the gear icon in the upper right corner
  5. Select View all Outlook settings at the bottom
  6. Click General
  7. Click Storage
  8. Your mailbox usage will be displayed

Recover Deleted Items


  1. Open Microsoft Outlook
  2. Click on the Deleted Items folder
  3. Click on the Folder ribbon tab
  4. Next, click Recover Deleted Items
  5. Outlook will now display all recoverable items that have been deleted in the past 14 days
  6. Select the item(s) that you wish to recover
  7. Make sure Restore Selected Items is selected, and then click Ok (NOTE: If you click Purge, the selected messages will be deleted permanently)
  8. After clicking that button, your messages will appear in your Deleted Items folder

Office 365 Web Access/Outlook for Mac

  1. Open a Web Browser
  2. Log into your account at
  3. Select Outlook
  4. Select the Deleted Items folder
  5. Choose Recover items deleted from this folder at the top under Deleted Items
  6. Select the message(s) you wish to recover
  7. Click Restore to recover the selected item(s). (NOTE: If you click Purge, the selected messages will be deleted permanently.)
  8. Repeat this process for any other message(s) you wish to recover

Keywordsoffice, 365, email, limit   Doc ID96032
OwnerNDSU Help DeskGroupIT Knowledge Base
Created2019-11-20 11:28:43Updated2024-04-10 10:11:43
SitesIT Knowledge Base
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