Check your mail quota
Each person has a certain amount of space in their mailbox for their email, contacts, tasks and calendar. The default quota of 10GB should be adequate for all but the most demanding users.
Personal mail quota can be checked by following the guides below:
- How to: Check your mail quota in Outlook 2010
- How to: Check your mail quota in Outlook Web App (OWA)
If a mailbox requires a larger quota, you can make a request to the IT Support Centre.