Opening the Application log within Event Viewer showed the following critical error with the text
“A certificate validation operation took 30015.2428 milliseconds and has exceeded the execution time threshold. If this continues to occur, it may represent a configuration issue. Please see http://go.microsoft.com/fwlink/?LinkId=246987 for more details.”
to fix this run sharepoint powershell as Administrator:
$SProotCert = (Get-SPCertificateAuthority).RootCertificate
$SProotCert.Export(“Cer”) | Set-Content C:\SProotCert.cer –Encoding Byte
this command will export certificate to C:\ drive
Open the Certificates MMC by opening a Run command and type MMC. Choose File -> Add/Remove Snap-in. Select the Certificates Snap-in and click Add. On the next screen select Computer account and click Next followed by Local computer and Ok.
Right-click on Trusted Root Certificates and choose All Tasks -> Import
certificate C:\SProotCert.cer
These steps fixed the error on most of our SharePoint servers, but it remained on two. In order to fix the error on the two remaining servers I configured proxy access through Internet Explorer, then from an elevated command prompt ran “netsh winhttp import proxy source=ie” This configures Windows to use the IE proxy configuration as a default. The servers were then able to access the internet and verify the certificates.
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