Step 1 - Locate the default Outlook data file
Select Start, and then select Control Panel.
In Control Panel, select Mail.
In the Mail Setup - Outlook dialog box, select Show Profiles.
Select your current Outlook profile, and then select Properties.
In the Mail Setup - Outlook dialog box, select Data Files.
Select the Data Files tab in the Account Settings dialog box, and then note the name and location of the default data file for your profile (a checkmark will denote the default data file).
Step 2 - Create a new Outlook profile
Step 3 - Configure your new Outlook profile as the default profile
If you want to set the new Outlook profile as the default profile, follow these steps:
On the General tab of the Mail dialog box, select Always use this profile.
Select the drop-down under Always use this profile, and then select the new profile.
Select OK to close the Mail dialog box.