You need your password if you make changes or reinstall Outlook.
Since one of the recent upgrades to Outlook for Mac 2016 (running version 15.17.1), when I open my Outlook program it is unable to connect immediately to Comcast email server. When you’re asked if you want to set up Outlook to connect to an email account, make sure that Yes is selected and then click the Next button. Note: if the Welcome message doesn’t appear, jump down to the Create New Account section below. Click the Next button to begin the setup. When it starts, the ‘welcome screen’ should appear. I asked the person to pass up the ladder that I was PISSED OFF that I was never notified of the change. I work remotely most of the time, and due to restrictions on our hosted email server, allowing sending only from within the office’s range of IP addresses, I have to send through my comcast account. I can only imagine how long it would have taken to get this fixed had I not found your site right away. I don’t believe English was the person’s first language, either. She (I think) tried to give me a link for a “one-click fix” for express. The person was confused, as they had no idea that there was an “Outlook” versus “Outlook Express”.