Calendar: Outlook for Mac lacks the following calendar features from its Windows counterpart:.Sending mail as a distribution list is not possible.Finding related messages is not possible.Not possible to set a folder retention policy.Folder (order) customization is not possible.No preview attachment feature in mail messages (in the cloud).Mail: Outlook for Mac lacks the following features from its Windows counterpart:.There is a direct correlation between the numbers of users and support, which implies more support for Outlook for Windows. On the other hand, there are nearly 100 million active Mac users. Users: Windows has nearly 400 million active users worldwide, and it is estimated that there are more than 1 billion Windows-powered PCs in use.Following are some of the significant differences: To understand the difference between MS Outlook and Outlook for Mac, we will now be comparing Outlook 2016 for Mac and Outlook 2016 for Windows. Try automated tool Kernel for OLM to PST Converter to migrate OLM to Outlook PST, Office 365, Exchange Server, etc flawlessly.