Troubleshooting: Microsoft SharePoint On-Premise
The Trusted Identity Provider section is grayed out on the Edit Authentication page.
Make sure Claims Based Authentication is selected as the preferred mode of authentication for this SharePoint application. From the Windows PowerShell command prompt, enter the following to set the speciﬁed user account as an administrator for the site:
$WebAppName = "http://" (http://)"
$wa = getSPWebApplication $WebAppName
$wa.UseClaimsAuthentication = $true
Authentication fails and shows a webpage with the error, "An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed."
Open the web.conﬁg ﬁle for this web application and make sure custom errors are turned oﬀ in the web.conﬁg ﬁle.
Authentication fails showing a webpage with the error, "The Audience URI could not be validated."
Open the web.conﬁg ﬁle for this web application and add the following line:
(mode=Never) (Note that "Never" must be entered with a capital N).
Why do I see both Windows Authentication and Okta for SSO when I try to sign in?
Both Windows Authentication and Okta are chosen as Identity Trust provider. Uncheck Windows Authentication if you just want Okta to act as a trust provider.
I changed authentication providers but there is no eﬀect.
Refer to http://technet.microsoft.com/en-us/library/cc288091(v=oﬃce.12).aspx. Resetting your IIS server (iisreset) should usually help.