Windows 10 laptop.
I uninstalled Office 2010 and installed Office 2016 on a user's laptop and now when I open Outlook, it opens a window that says Windows Security and it has areas for domain\user and password but no matter what I put in, it won't get past it.
When I click cancel, I get the message: Cannot start Microsoft outlook. Cannot open the Outlook window. The set of folders cannot be opened.
I went into Settings - Accounts - Email and Accounts and added the users work account (O365) but it still won't work.
Any ideas? I reloaded Office 2016 again as well.