What does unlimited mailbox storage mean?
Unlimited mailbox storage means that clients of our Secure Exchange Service don’t need to manage user quotas or be concerned about billing surprises because of increased email activity. This does not mean that using Microsoft’s Outlook and Exchange will work with an infinitely large email box – there are practical limits to how large a mailbox can be before performance becomes unacceptable. It also doesn’t mean that a mailbox can be defined as an “archive” – which would be impractical and inconsistent with archiving requirements.
