Note: Whenever an account has used 90% or more of their inbox capacity, Outlook on the web will display a notification until the account is below 90% of inbox capacity.

1. Log into Outlook on the web.
2. Click the Settings/gear icon .
3. Click General | Storage.

   Important: The total quota usage includes both email and calendar data in the account. The folder listing on this page only shows email folders - it does not include calendar folders. To see your calendar folder/usage, you will need to use Outlook for Windows/Mac desktop client instructions listed below.

Note: These steps assume you are connected to your Microsoft 365 account via Exchange.

Classic Outlook

1. Start Outlook.
2. Right-click anywhere on the bottom Outlook bar.
3. Click on the first option "Quota Information" and you will see that it switches to the "On" mode.
4. You can now see the amount of free space left and the number of items you have in each folder, in the bottom left hand corner of the Outlook bar.

For calendar usage/quota, use the following steps:

1. Start Outlook.
2. Go to Calendar.
3. Right-click on the desired calendar and select "Properties" from the sub-menu.
4. Click Folder Size... button.

New Outlook

1. Start Outlook.
2. Click the Settings/gear icon .
3. Click Account | Storage.

Note: These steps assume you are connected to your Microsoft 365 account via Exchange.

1. Start Outlook.
2. Right-click on the account name within your mail folder listing and select Properties from the sub-menu.
3. Click Storage from within "Folder Properties" screen.
4. Depending on the number of objects (mail folders, calendar items, contacts, and tasks) you have in your account, it can take minutes for this information to be retrieved.