Unable to Send/Receive Email Due to Mailbox Size

If the total folder size for your mailbox is higher than five times the size of your plan size, you have reached Exchange's hard limit and will be unable to send or receive email. Your plan has a hard limit of approximately five times the plan size (i.e.: 500MB X 5 = 2500MB; 1000MB X 5 = 5000MB; 3000MB X 5 = 15000)

To check that you have exceeded the allotted space and are above the hard limit size for your mailbox:

1. Open Outlook.
2. Right-click on 'Mailbox - Your Name' and select "Properties".
3. Click Folder Size on the General tab.
4. Select the Server Data tab and note the number in the Total Size field.

If you are unable to Send/Receive emails because you have exceeded your hard limit, the following options are available:

1. Upgrade your plan via the hosted Exchange Control Panel (you must be an administrator for your organization to do this). This change will take up to 2 hours to take affect.
   
   
2. Empty your Deleted Items folder by right-clicking on the folder and selecting "Empty 'Deleted Items' Folder". Remember that items inside your Deleted Items folder count against your quota.
   
   
3. Archive older emails via Outlook > File > Archive. Archiving will remove items from your mailbox and store them locally in a .pst file which can be opened within Outlook.
   
   
4. Create a .pst file in Outlook and move items to it: Outlook > File > New > Outlook Data File.