Project Center was a feature that was available in Entourage but is not available in Outlook for Mac. However, Outlook has multiple features that you can use to organize projects.
Important: If you used the Project Center in Entourage and then import your Entourage information into Outlook, Project Center associations are converted to categories. For example, if you added items to a project that was titled "Research Paper" in Entourage, these items are assigned a category that is called "Research Paper" in Outlook.
Outlook for Mac contains the following features to help you organize projects:
Categories You can assign messages, contacts, or any other Outlook items to one category or multiple categories at one time.
Rules You can set up rules that automatically assign a specific category to certain messages. For example, rules can be set up to categorize messages from certain contacts, or categorize messages that contain certain words in the subject.
Follow-up flags and due dates You can flag contacts and messages for follow up, and add start dates, due dates, and reminders.
Smart Folders You can create a virtual folder that contains any items that meet your search criteria, such as all the items from a category.