Latest (Dec2024) round of SharePoint 2019 patching has killed all of my workflows

Question

After enacting the security updates for SharePoint server 2019 (KB5002664 and KB5002657) all my workflows have stopped working across all site collections across the farm. The workflows break upon starting. I am wondering if Microsoft is aware and how we are meant to get around this in the meantime as this is a really large problem. No other changes have been made to the environment and it is definitely the most recent patching that has broken it.
https://support.microsoft.com/en-us/topic/description-of-the-security-update-for-sharepoint-server-2019-december-10-2024-kb5002657-c32d5f02-b7f3-44a8-88f8-daeef242ad28

https://support.microsoft.com/en-us/topic/description-of-the-security-update-for-sharepoint-server-2019-language-pack-december-10-2024-kb5002664-ad00ff76-b7d0-46d3-93e1-5face5af8f68

Answer 1

Hi @Delaney Troop ，

Welcome to Q&A forum!

I fully understand your desire to solve the problem. I did some research and found that the update KB5002639 mentioned that the update would affect SharePoint Workflow. Because SharePoint Server is a cumulative update, the updates after KB5002639 did not mention the fix for this impact. You can try the solution provided in the KB5002639 update to see if it can solve the problem.

If it doesn't work, you can try to roll back the update or wait for the next update to see if it can solve the problem. However, the forum engineer has limited authority. If you need to roll back the update, you need to escalate the issue. You need to contact Microsoft directly to operate. The support team over there has the correct escalation channels, and they can devote more resources and investigate the behavior from the backend as quickly as possible. They can also remotely check the behavior on your side. They can even help you find the root cause of the issue. For reference: Global customer service phone numbers. This is the most efficient way to handle this thread given the circumstances. I'm confident that our expert engineers over there can resolve this issue efficiently and accurately.

Good day!

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Answer 2

Workflows started resuming from pause after we added the authorized type

authorizedType Assembly="Microsoft.Office.Workflow.Actions, Version=16.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" Namespace="Microsoft.Office.Workflow.Actions" TypeName="*" Authorized="True"

to C:\Program Files\Common Files\microsoft shared\Web Server Extensions\16\BIN\OWSTIMER.EXE.CONFIG our SharePoint servers and restarted all servers. 

Answer 3

Hope this helps your situation.