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I know that I can go to the web interface and use just my username, not the full email address, to login to my account. Can the same be done when setting up say a mobile device?
The main reason I ask is if we take the users from our old iMail system, where they only have say Joe.Blue as their username and import them as Joe.Blue@company.com? And then for the user, the change is transparent if they can continue to connect with just Joe.Blue?