Enter the email address for the profile you would like to create and click generate.
Save the prf file.
Click Start > Run
In the run box enter the following command replacing the filepath and filename with the path and file of the saved prf.
outlook.exe /importprf c:\path\to\file.prf
Outlook will prompt for a username and password, enter the credentials for the account associated with the profile, this is to verify the account on the Exchange server.
If you selected the "Make Default Profile" option, then when the second credential dialogue opens enter the credentials again. If you did NOT select the "Make Default Profile" option, the credential dialogue is for the existing profile, so the user should login normally.
Outlook will by default use a single profile. To change this behavior or select a different profile follow the below instructions.
Changing the default profile:
Click Start > Control Panel
Click Mail (If your control panel view is "Catagory" Click User Accounts > Mail)
Click Show Profiles
Under "Always use this profile" Select the profile you would like to be opened by default when outlook is started.
Optionally, by selecting "Prompt for a profile to be used" you can switch between existing profiles.
Close and Re-open Outlook. The new profile will prompt for a username and password.
Prior to migrating, its often convenient to have profiles for users available before cutover time. This eases the migration since the profiles are in place and are configured for the new mailboxes. Users only need to change to the new profiles.
If you are creating profiles prior to migration, to ensure that the profile is not reconfigured by an existing Exchange server you will need to Cancel any Outlook pop-ups that ask to "Allow this website to configure email@example.com server settings?". If it happens however it is a simple matter to remove the profile and reimport it via the prf.
If your users are domain users and you have access to add GPO policies, they can be used to update profiles for the user.