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Can't access Activity Party List Drop down values for Custom Activities in CRM


Trying to create a custom activity record in our system
using Common data Service in Power Automate

When I try to access the activity party List drop down
I saw the following error message


Could not retrieve values. Encountered internal server error.
The tracking Id is 'efadf44f-43a3-4f22-9ac0-39d2910e1577'.
Enter custom value


The entity where I encounter this is a custom activity for Dynamics CRM .
For OOTB activity entities like appointment and Phone call
I could access the drop down


My Question is are custom activity entities supported in flow ?

If not do I have to do my work using Azure functions 


or is it just a case of there is something wrong with my enviroment 

and Microsoft should check it out ? 

My site settings
Enviroment: CoatesHire-dev





Frequent Visitor


Some pics to help out 

Community Support
Community Support



Yes it should be possible to use custom entities. Since its having difficulty pulling the specific data from this custom activity, I would recommend trying to enter them manually using the "enter custom value" option. I would also recommend creating some test flows to see if you can pull from the custom entity using other less specific actions. If you are still having issues you can always create a ticket with Microsoft support. I'll include a link below if you would like to go down that route.


If you would like to create a ticket with Microsoft Customer Support here is a link on how to do so:








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

Frequent Visitor

Thanks Alex 

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