There are some issues and errors you face with Outlook when you do not know the root cause of the problem. There can be many things that can cause Outlook 2016 won’t start. Here are some solutions for the same. You can go to the account settings and click on the email tab. Then, click on repair to open the repair wizard and it would get rid of any errors. You can also change your profile. Manually repair the Outlook data files. Make sure that Outlook is not in compatibility mode. https://contactforhelp.com/blog/things-to-do-when-outlook-wont-open/