Checking your Mail box usage

You can check your O365 mailbox quota and usage in the "Options" of Office 365 Outlook Web App (OWA):

  1.   Login your O365 account at
  2. Open your mailbox by clicking the outlook mail icon
  3. Click  (gear) icon at the top-right corner of OWA window.
  4. Select Mail under Your app settings.
  5. Under the General heading select My Account
  6. In the bottom right corner there will be a visual for your mailbox usage 


Mail will no longer send once mailbox storage reaches 49.5GB


Article ID: 49564
Tue 3/6/18 9:20 AM
Mon 6/13/22 2:45 PM