Build the Master Category List - Get Color Coding



To build the new category list in Outlook 2010, you can right click on the top of the mailbox and choose Properties. Here you’ll see a button called “Upgrade to Color Categories…”. When you press this button, Outlook will look through the entire mailbox for categories and when found, it will add them to the Master Category List.
 

Build the Master Category List by using the Upgrade to Color 


 

Command line alternative

You can also start Outlook with the /remigratecategories switch to achieve the same result;

  • Windows XP 
    Start-> Run; outlook.exe /remigratecategories
  • Windows 7 
    Start-> type; outlook.exe /remigratecategories