Microsoft 365 SharePoint Online performance troubleshooter


The Microsoft 365 SharePoint Online client performance diagnostic package collects information that can be used to troubleshoot SharePoint Online client performance issues. This diagnostic package also lets you capture a Fiddler trace of HTTP(S) traffic while you reproduce these performance issues.

This diagnostic package uploads trace files of up to 2 gigabytes (GB) after the files are compressed.

More Information

Required permissions

The rules in the diagnostic package require that you are the SharePoint Online site collection administrator for the SharePoint Online URL that you enter.

Screenshot of the SharePoint Online site collection administrator credentials input dialog.

This article describes the information that may be collected from a computer that's trying to connect to SharePoint Online in Microsoft 365.

Fiddler or network trace output

The following data may be collected by the Network Capture diagnostic that's run by the Microsoft Support Diagnostic Tool.

The files are typically large, and therefore the diagnostic may take several minutes to finish. After this diagnostic runs, the collected traces will be automatically compressed and then uploaded to Microsoft Support. A total size of up to 2 GB can be uploaded.

If the results files are larger than 2 GB after compression, some files won't be uploaded and will be left on your system. In this case, you must contact a support professional to ask for an alternative way to upload the remaining collected information.

Description Filename
Fiddler Trace {Computer_name}_fiddler.cap
Network capture information from nmcap.exe output {ComputerName}_netcap.cap; {ComputerName}__NMcap_Trace_DisplayNet.txt}__NMcap_Trace_DisplayNet.txt

Site performance rules


To install this package, you must have Windows PowerShell 2.0 installed on the computer. For more information, see Windows Management Framework.

The following checks are performed by the Microsoft 365 SharePoint Online diagnostic package:

Rule ID Title Reference
4C7B890F-F367-4719-B5D2-85AB4200B144 Checks whether Receive Window Auto-Tuning Level is disabled Ensuring your Microsoft 365 network connection isn't throttled by your Proxy
8D1F2D6E-07FF-462C-9EBE-02E44CCAE5A5 Checks whether round-trip time between client and server isn't greater than 300 ms. How to measure the Network Round Trip Time to Microsoft 365
1750D57E-FD44-4A83-8FCF-56B7DB0124BB Checks whether Minimal Download Strategy is disabled. Minimal Download Strategy overview
AB374115-9DCE-4977-BE87-22DD321E6737 Checks whether Structural Navigation is turned on for a SharePoint Online publishing site. Managed navigation in SharePoint


For more information about which operating systems can run Microsoft Support's diagnostic packages, go to Information about Microsoft Automated Troubleshooting Services and Support Diagnostic Platform.

Still need help? Go to SharePoint Community.