Edge (microsoftedge.exe) manages multiple Microsoft Edge Content Processes (microsoftedgecp.exe) that do the actual work of loading web pages. The content processes do not share proxy credentials that are entered by the user. As a result, when a new content process receives an authentication challenge from its proxy, the browser will prompt for proxy credentials. Users may get repeated credential prompts.
Also, the first time you type something in the Cortana search box, Edge starts searchui.exe and to perform the search. That might cause a credential prompt as well.
To minimize extraneous authentication prompts, use MS edge version 38 or later. Recent versions of Edge seem to maintain a more static set of content processes than earlier versions did. That helps reduce the number of credential prompts, but it doesn’t eliminate all of them.
The extraneous credential prompts have been mostly observed when using the “proxy” authentication mode. So, if possible, IP surrogate ("Proxy-IP" or "Origin-IP-Redirect") with longer surrogate refresh time can be used to minimize the authentication prompts.
IE 11 can be used as an alternative. A workaround is to configure browser-dependent Windows applications to use IE 11, rather than Edge. IE 11 doesn’t exhibit this problem.
If problem still persists, Please contact Microsoft regarding this issue.
Imported Document ID: 000032625
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