For information on Windows Phone 7.5, please read this article - http://blog.brightpointuk.co.uk/setting-microsoft-exchange-email-account...

I apologise in advance for the quality of these images, as you'll see they're photos rather than screenshots, and the device pictured had recently been accidentally "bounced", but follow the text and you should be able to set up an Exchange ActiveSync email account on your Windows Phone 7 device. I will update these images as soon as possible. If anyone in the blogosphere knows of an easy way to capture screenshots on the new Windows Phone 7 platform please let me know (you can use the Contact Form)

Also note that these images are taken from a prototype sample of a device which I am not at liberty to divulge, specific launch devices may have different menus and features, which I will naturally update on the blog when possible.

As with all Exchange ActiveSync clients, Exchange 2003 SP2 or later is required on the Exchange server in order to be able to enjoy push mailbox data synchronisation.

To configure your Exchange email account, access the Settings menu and select email & accounts:

Select the option to Add an account:

Select the option to add an Outlook account:

Enter in your email address and password (your Active Directory password, the same password you would use to log into your office PC or laptop) and click Sign In.

The device will then attempt to determine the correct settings automatically, which it probably won't be able to:

Enter in your username if incorrect (this is by assumed by the device to be the content of your email address before the "@" sign, but if your username is "firstname and first letter of surname" and your email is not, then it will need to be edited)

Enter in your Domain. If you don't know this information, this will be the contents of the "Log Into" field on your office PC when you log in, underneath the username and password fields. Click Sign In.

The device will then try to log in again, which it may not be able to:

Select Advanced:

Enter in the Server Address. If you don't know this information, contact your IT department, but if you access your email via a web browser, it will be the same address used to access this, normally in the form "mail.mycompany.com". Click Sign In:

The device will now connect to the Exchange Server and begin to synchronise. By default all mailbox folders will be synced (Email, Contacts and Calendar). To edit these preferences, tap the entry for the email account:

Enter in a name for the email account, select which content you wish to sync and how often.

Your account is now configured.

NOTE - at the time of writing the Exchange ActiveSync client on Windows Phone 7 will not connect to an Exchange server that uses a self-signed SSL certificate, the corresponding root certificate from the certificate authority which issued the certificate to the Exchange server must be installed onto the device manually.
At the time of writing the only means I have found of accomplishing this is to set up an alternate email account on the device, such as a Hotmail or Google email account, and email the certificate file to the account. Once downloaded to the device as an attachment it can be installed. Once installed, the Exchange email account can then be configured as usual.

Update - certificates can also be installed onto devices by placing them on a web server in "p7b" format, then pointing the device browser to the file.

For detailed steps on how to locate the root certificate for your Exchange server read this article - http://blog.brightpointuk.co.uk/locating-and-installing-non-trusted-exch...

Once synchronised, the device will be listed in the Mobile Device options within Outlook Web Access:

The Remote Device Wipe feature will hard reset the device over the air and restore the unit to a factory default state without prompting the user.