Currently, We are getting the credential prompt for each web applications when user accessing from out side network. our SharePoint web application is open in internet but when any user accessing from outside our domain he is getting prompt for each web application.is there any mechanism that will allow me one login in one browser an din same browser I can access other web application without prompt. example google if we login to google they we no need to login again for youtube, drive and other google product. we want only one authentication prompt to authenticate multiple web application.
below is multiple web application in same farm.
Web application - xxx.xxxxxx.com Web application - yyy.xxxxxx.com Web application - zzz.xxxxxx.com
It asks credential three times. but my requirement is that It should prompt for credential only once and will forward authorization for other application if it opens in same browser in multiple tab.