asp.net - Azure Web App suddenly returns 401.72 for all request -

i have problem similar this one, not quite.

we have solution 2 azure web apps, built , deployed visual studio online. has been working fine few months, requests end in 401.72 response:

http error 401.71 - unauthorized not have permission view directory or page.

most causes: authenticated user not have access resource needed process request.

things can try: create tracing rule track failed requests http status code. more information creating tracing rule failed requests, click here.

detailed error information: module easyauthmodule_32bit notification authenticaterequest handler
extensionlessurlhandler-integrated-4.0 error code 0x80004005 requested url https://[appname]:80/ physical path
d:\home\site\wwwroot logon method not yet determined logon user
not yet determined

more information: generic access denied error returned iis. typically, there substatus code associated error describes why server denied request. check iis log file determine whether substatus code associated failure. view more information »

microsoft knowledge base articles:

as far can figure out, no relevant configuration changes has been done.

restarting web app , redeploying solution didn't solve problem

as happens, due recreate environment anyway, , after done, same deployment setup (with updated target) deployed , it's working fine on new web app intsance.

even if have working environment, we'd know happened, can sure doesn't happen again.

can shed light on this?

you had easy auth turned on. expect turned on? appears causing issue.

if don't intend on, please turn off via either portal (old|new) navigating web app , finding in settings.

if intend on, need check configuration make sure you've set aad. maybe app configuration within aad has changed?

if neither of things helps, let me know.