500 server error and application pool crashes after September 2023 CU for SharePoint:

How can this be resolved?

As a workaround(!) the SharePoint AMSI integration can be disabled for each affected web application using the following PowerShell command:

Disable-SPFeature -Identity 4cf046f3-38c7-495f-a7da-a1292d32e8e9 -Url http://url-to-webapp

I hope the above information will help you to resolve the issue, in case of any queries/questions regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues, Thank you.

September 2023 CU for SharePoint Server 2016 is available for download:

The product group released the September 2023 Cumulative Update for SharePoint Server 2016 product family.

This CU also includes Feature Pack 1 which was released with December 2016 CU and Feature Pack 2 which was released with September 2017 CU

The KB articles for September 2023 CU should be available at the following locations in a couple of hours:

• KB 5002494 – September 2023 Update for SharePoint Server 2016 (language independent)
  This is also a security update!
• KB 5002501 – September 2023 Update for SharePoint Server 2016 (language dependent)
  This is also a security update!

The downloads for September 2023 CU are available through the following links:

• Download September 2023 Update for SharePoint Server 2016 (language independent)
  This is also a security update!
• Download September 2023 Update for SharePoint Server 2016 (language dependent)
  This is also a security update!

SharePoint 2016 September 2023 CU Build Numbers:

Language independent fix: 16.0.5413.1001
Language dependent fix: 16.0.5413.1000

    

I hope the above information will help you to resolve the issue, in case of any queries/questions regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues, Thank you.

September 2023 CU for SharePoint Server 2019 is available for download

September 2023 CU for SharePoint Server 2019 is available for download:

The KB article for September 2023 CU will be available at the following Location in a couple of hours:

• KB 5002472 – September 2023 Update for SharePoint Server 2019 (language independent)
  This is also a security update!
• KB 5002471 – September 2023 Update for SharePoint Server 2019 (language dependent)

The downloads for September 2023 CU are available through the following links:

• Download September 2023 Update for SharePoint Server 2019 (language independent)
  This is also a security update!
• Download September 2023 Update for SharePoint Server 2019 (language dependent)

SharePoint 2019 September 2023 CU Build Number:

Language independent fix: 16.0.10402.20016
Language independent fix: 16.0.10402.20016

I hope the above information will help you to resolve the issue, in case of any queries/questions regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues, Thank you.