Office 365, Email, Exchange, How to check quota
How do I check my Exchange Online quota?
Once logged in
- click the gear icon in the upper-right corner
- click the link "View all Outlook settings"
- click on "General" in the left column
- click on "Storage" in the middle column
This will show the amount of storage used and what is remaining. These are firm limits and cannot be adjusted on a per-user basis.