Page Diagnostics for SharePoint is a simple to use tool that can be installed in the browser and can provide you simple basic troubleshooting for your slow SharePoint sites. Hopefully Microsoft in the future will expand the use cases for the tool. The has very limited use case but it will help you troubleshoot. Here are the top five reasons that you may notice your SharePoint Online is slow, or that your environment is running slower than expected 1. Structural navigation: This is the most common and has most impact on performance.

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!!!!

This can give you a quick view of the different files that might be causing slow page loads on your site. Setting up a non-customized baseline for SharePoint Online The best way to determine your site's performance weak points is to set up a completely out-of-the-box site collection in SharePoint Online. Our SharePoint 2013 environment was behaving very slowly and one of the WFE utilization is crazy high. It is particularly obvious when publisher is trying to update the Enterprise Keywords field (Managed Metadata field) for French site.

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:

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.

Why Is Sharepoint Online Slow

Sharepoint 2013 very slow cooker

Sharepoint List Slow

Sharepoint 2013 Very Slow

Sharepoint Slow Download

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