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Exchange 2010 Autodiscovery Use Email address as login

I am currently setting up out exchange 2010 server and running into a problem where a login box apears after autodiscovery has completed. I belive this to be the login to exchange 2010.

The problem is that it only accepts the domain\user not the email address which is firstname.lastname@domain.com

Where it gets a bit compliated and where im getting lost is that our network login names are firstnamelastinitial e.g tonyp

Is anyone aware of a way that the exchange login will accept email addresses as usernames?
1 Solution
The only way to achieve that is to add an additional UPN suffix to AD Domains & Trusts, then modify all your user accounts such that their logon name reads the same as their email address, including selecting the correct suffix from the dropdown menu.

Your pre-windows 2000 names can remain DOMAIN\tonyp for logon and general day-to-day purposes.

Of course, with such a big change in your identity management method, you must test, test, test first with a single user account to ensure nothing untoward happens before rolling out to all your users!

Jian An LimSolutions ArchitectCommented:
in a normal setup, login box should not appear after autodiscover session.

Have you configure Outlook anywhere? basic mode sometimes trigger certain things.
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