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Parallel Approval with multiple approval-users - limited?


i send a dynamic set of parallel Approvals to couple of users.

That means i have approx. 7 dynamic generated parallel Approval-Activitys which will be sent each to approx. 10 users.


This works with a "Apply to each" and configured to "Concurreny Control:ON". So the apply-to-each sends some approval tasks to some users, which are defined in SharePoint-Groups and the FLOW reads the user first out of the SP-Groups into an array.

  • If i configure the "Concurrency Control:OFF" then the FLOW will send the Approval-Task to the users sequential.
  • But if i configure the "Concurrency Control:ON" the the FLOW will fail and give me an error "bad request with ApprovalAssignedToTooManyUsers" -> approval may not be assigned to more than 17 users.

The message is a little bit strange, because i don't find any used SharePoint-Group which has more than 12 users. So i think the root-cause is another issue. Did someone got this issue in past?


thxflow approval.png








Community Support
Community Support

Hi @Roger365,


Could you share screenshots of Flow configuration?

You could try to output the user contained in this group in Flow, the number may exceed the limit.

In addition, the value you configure in the Assigned list may be more than one group.

Please provide more details and we would provide proper workaround for you.


Best Regards,

Community Support Team _ Barry
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.


yes of course.

For clarification, how the workflow is working:

  • An "ApproverPoolRole" is a SharePoint-Group, which contains just a couple of User (3-8 Users)
    • So there are approx. 5 ApproverPoolRoles
  • ApplyToEachRole - The Users will be read from the SharePoint-Group and hold in an Variable.
  • So for every ApproverPoolRole( or this users) we will send an ApproverTask in parallel.






Hi, do you have some insides? Because the error-message from FLOW is clear. What says your MS Developers for FLOW? thx

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