With the growing popularity of the Social Intranet thanks to products like Noodle, old business production suites are becoming a thing of the past. Outlook has all the features you want, but it but it’s not a very user-friendly utility.
Long time users of Outlook may have trouble finding certain items and menus in newer versions of the product. Not many sort or search capabilities. Lack of support for non-Windows systems. Not mobile friendly. Outlooks role in the office is rapidly being replaced but much more versatile out of the box solutions.