It has come to my attention that an update has broken Microsoft outlook. for further information and recovery please see here Microsoft Outlook bug prevents viewing or creating email worldwide (bleepingcomputer.com)
however - OAuth2 is required, its stored as a cookie - so dont delete cookies! or set an app password in gmail settings to get access with other less secure apps. "some"? stupid? the list of critical cve is long for versions build after 2014 https://www.cvedetails.com/vulnerability-list/vendor_id-26/product_id-113/Microsoft-Outlook.html unsecure browsers are PITA, but an unsecure email program is quite worse for its user.