Log Name: Application
Source: Microsoft-SharePoint Products-SharePoint Foundation
Event ID: 8311
Task Category: Topology
Description: An operation failed because the following certificate has validation errors:
\n\nSubject Name: CN=SharePoint Security Token Service, OU=SharePoint, O=Microsoft, C=US\nIssuer
Name: CN=SharePoint Root Authority, OU=SharePoint, O=Microsoft, C=US\nThumbprint:
7884622F8B800E7AFAAFD3DDF98BE8AC96D4F952\n\nErrors:\n\n The root of the certificate chain
is not a trusted root authority.
Additionally, other areas such as search, claims authentication also do not function correctly.
Note Specifically, the local trust is located in Central Administration > Security > Manage Trust
$rootCert = (Get-SPCertificateAuthority).RootCertificate
New-SPTrustedRootAuthority -Name "localNew" -Certificate $rootCert
After running the above commands, perform an IISReset on all servers in the farm.