https://www.emailfix.org/error/outlook-keeps-asking-for-password-gmail.html
Microsoft Outlook, the most popular and great email client that allows user to use various email accounts from one window. However, Some people often get an error when adding a Gmail account. If MS Outlook keeps asking for password Gmail whenever you try to add a Gmail account, Don't worry this problem is normal and Outlook 2007, 2013 keeps asking for password Gmail, it can also happened with an already added account.