Exchange 2010: Exchange Quotas
Each Exchange account is initially allocated 2GB of storage. Each night the usage is checked, and if the usage is within 500MB of the current quota, the quota is increased by 500 MB. The increase will happen automatically until 10GB is reached. If additional storage is required beyond 10GB, it must be requested via the IT Support Center.
If an initial quota larger than 2GB is required, such as in the migration from another UD email system, the request should be included in the comments section on the UD Exchange Account Request Form.