I have ArcGIS for Server 10.3.1 installed on a vm with Windows Server 2012. I am using a Web Adaptor on my web server which is on a different machine. I am using Active Directory for my user store, ArcGIS authentication and roles. This is an intermittent error meaning sometimes my credentials work and sometimes they don't! Here is a screen capture of the error in ArcGIS Server Manager. We do not have HTTPS set-up.
This problem happens when I try to log into ArcGis Server Manager. I enter my credentials and get an error that says my username and password are not correct. I hit the Login button again and get the same thing. I get in after 2 or 3 or more tries but I do get in without reentering my credentials so they are correct. Here is a screen capture of the error:
I also have some secured services that go through a proxy to display for the public website. Sometimes my users are challenged for credentials and sometimes they are not. This process uses a proxy but displays the same error in the log file so I believe it is the same issue. The proxy does not use the Active Directory because I have a local user credentials in the proxy.
I have discussed this with ESRI technical support and the answer is that there is a communication issue between my Active Directory server and my ArcGIS Server. That is just great but I can not find it and I have been looking and my IS folks have been looking!
Has anyone else run into this issue? Has anyone solved it? Are there any suggestions on how to troubleshoot this?