When you assign a category to an item, the item is displayed in the color of the category. Categories help you to quickly organize items in groups.
Four default categories (Follow-up, Low priority, Personal, and Urgent) are available for you to assign to items. You can modify and delete these categories if you choose, as well as create new categories. When you assign a category to an item, by default, the item is displayed in the color of the category.
If you assign one of the default categories to an item you are sending, the item arrives in the recipient’s Mailbox with that category assigned. If you assign a category that you created to an item you are sending, the item arrives in the recipient’s Mailbox with no category assigned.
If you assign one of the default categories to an item in a shared folder, the category appears for all users on the item in the shared folder. If you assign a category that you created to an item in a shared folder, the category is only visible to you.
Items can show multiple category colors assigned to them by adding the Categories column to the folder view or by displaying the folder in summary view. When you mouse-over the color representing the category, the name of the category is displayed. The Category column itself can be sorted, and it will sort the items by category according to the order you set up when you configured your categories. When items are sorted by category, they will display in multiple places in the sorted list if the item has multiple categories.