Performance issues, pages are loading very slowly

One of my customers has been complaining that pages are loading very slowly in SharePoint 2013 site. Today I investigated this and I found the following Critical error in my ULS logs:

A certificate validation operation took 15002.1773 milliseconds and has exceeded the execution time threshold. If this continues to occur, it may represent a configuration issue. Please see for more details.

15 seconds!!!!

I then found this article (

Yes my customer has proxy settings configured in their environment. So I might be lucky. I chose to go for option 1 as I don’t like disabling things. There is a reason why things are put in place.

Your solution

I first create my certificate:

$rootCert = (Get-SPCertificateAuthority).RootCertificate 
$rootCert.Export("Cert") | Set-Content C:\SharePointRootAuthority.cer -Encoding byte

So now I have my SharePoint root certificate.

  • Tap or click Start, type mmc in Start search, and then press Enter


  • On the File menu, click Add/Remove Snap-in.


  • Under Available snap-ins, click Certificates, and then click Add.


  • Under This snap-in will always manage certificates for, select Computer account, and then click Next.


  • Select Local computer, and then click Finish.


  • In the console tree, double-click Certificates.
  • Right-click the Trusted Root Certification Authorities store.
  • Click All Tasks, click Import to import the certificate, and then follow the steps in the Certificate Import Wizard.

import certificate when pages are loading very slowly

Now I’m loading my site again and things are a lot faster.

Avatar for Pieter Veenstra

By Pieter Veenstra

Business Applications and Office Apps & Services Microsoft MVP working as a Microsoft Productivity Principal Consultant at HybrIT Services. You can contact me using

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