How can I see how much space is left in my AT&T Unified Messaging mailbox?
Find out how to check the available capacity in your AT&T Unified Messaging mailbox.
Check available storage in your messaging mailbox
To see how much storage you are using, click Calculate Folder Sizes on the PC Folder Lists screen. This displays the contents of your Inbox, Trash, and other folders that reside on the AT&T Unified MessagingSM server, not your computer.
Need more room? You can add space to your account 50MB at a time, up to 200MB.