This appears to be a bug within the MotoBlur interface for the Motorola Droid Razr, Droid Razr Maxx and the Droid 4.
As a work around, have the user enter a bogus email address and password. Once the auto-configure fails, the user will have the option to provide a server name, domain name and user id.
Once the setup is complete, go back to the list of accounts and change the email address and password to the correct values.
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