I recently needed to sign in as a test user on a SharePoint 2013 development environment, but I couldn’t locate the Sign In As Different User link that had been present in SharePoint 2010.
It’s no longer available in SharePoint 2013/2016.
This was always a handy option to have, especially for us developers who need to test our apps under different privileges, but I understand that it may not have been a useful end-user facing feature.
Luckily there’s still a way to sign in as a different user in SharePoint 2013/2016. Just go to the following URL:
(Microsoft says this won’t work with IE 10 & Safari browsers.)
Another way of signing in as a different user is of course to run the browser under another user account, but I prefer using the link above because I can save it as a browser favorite for quick access.
And there you have it :)