Forum Discussion

Brass Contributor

Feb 08, 2024

POL 2,000 project site limit...

Hi Team In POL if there is more than 2,000 projects, it is recommended to set up a separate project subsite. Is this a SP site or a MS Project site? I've thought it was a SP site but it doesn't s...

Paul_Mather
Feb 10, 2024
Hi James_Price ,

There is a limit on 2,000 sub sites per site collection, this is a SharePoint Online site collection limit.

Once the PWA Site collection has 2,000 sub sites, if you want to create additional project sites, this is when you need to create a new SharePoint site collection (Not a PWA site collection) to host the additional project sites. Details can be seen here: https://learn.microsoft.com/en-us/ProjectOnline/tune-project-online-performance?redirectSourcePath=%252fen-us%252farticle%252fTune-Project-Online-performance-12ba0ebd-c616-42e5-b9b6-cad570e8409c#project-site-configuration
Worth noting is the lack of support for user permission sync with project sites hosted outside of the PWA site collection: https://learn.microsoft.com/en-us/ProjectOnline/tune-project-online-performance?redirectSourcePath=%252fen-us%252farticle%252fTune-Project-Online-performance-12ba0ebd-c616-42e5-b9b6-cad570e8409c#sync-user-permissions

Hope that helps

Paul

RodFromm

Steel Contributor

Feb 08, 2024

I believe there is more to it than that. If for every project you create there is a Project site created then the 2,000 limit comes into to play, but I have heard conflicting answers to this from Microsoft engineers. Personally, we have two sites that each have over 5,500 projects without any issues, but we also don't create Project sites for every project.

Paul_Mather
MVP
Feb 10, 2024
Hello RodFromm ,

The PWA Site collection can have 30,000 projects but only 2,000 of those projects could have a project site if you only used the PWA site collection to host project sites.

Paul
- RodFromm
  Steel Contributor
  Feb 10, 2024
  Paul_Mather thanks for the information as could never find any information online.
- James_Price
  Brass Contributor
  Feb 14, 2024
  Hi RodFromm and Paul_Mather, FYI in the past I seen an instance where there were a total of 8,000 projects with about 3,500 sites in the pwa site and 4,500 in other subsites (long story). POL still seemed to function fine. But I was always worried it would slow to a standstill at any moment.
  James
  - RodFromm
    Steel Contributor
    Feb 14, 2024
    James_Price That doesn't surprise me. As I posted I have gotten conflicting answers from Microsoft engineers on the 2,000 site limit.