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List Members of a MS Teams Channel using MS Teams Connector

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Posted on by maggieS

Attempting to use MS Teams and channels for role security in a PowerApp. I tried to get the members (not owner) of particular channels in my MS Team Group. I have been able to use MS Teams Connector to get the Team Group Name, Group Id, Channel Name and Channel Ids and display them in a gallery. I cannot get MicrosoftTeams.ListMembers() to display channel members. The thread type of 'channel' for MicrosoftTeams.ListMembers() throws an error.
I also tried connecting to Office 365 Groups connector using Power Automate to get the group members via an http request, which was successful for the group, but am unable to substitute group id with channel id to get channel members using MemberOf.
Question is it possible to get members of a specific channel within a MS Teams Group in Power Apps or Power Automate?

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v-jefferni Microsoft Employee on at

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Hi @maggieS ,

List channel members is only supported in Power Automate:

I typed custom values "Channel" in Thread Type field. Then Team and Channel fields came up automatically.

Best regards,

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maggieS 18 on at

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Thank you for the help. I tried to use this action with a threadType of Channel in your suggestion and the parameter selections were valid for the Team and Channel but on save I get the error msg "Flow Save failed with code : "OpenApiOperationParameterValidationFailed" and message 'Input parameter 'threadType' validation failed in Workflow operation 'List_members:' The API Operation 'ListMembers' requires the property ThreadType to be set to one of its enum values ["groupchat"] but is set to 'Channel'.

Also I have a question, if I am running this as the user, then if I include it in an app with a button to trigger the power automate flow, the user clicking the button is going to be the user connected to the action, correct? So if they do not belong to any of these channels it will generate an error in the flow?

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ograss 2 on at

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Hello, thank you very much for the suggested solution.

Unfortunately there still seems to be a problem with the thread type “channel”.

That's a shame, especially because the thread type "channel" is described in the associated documentation.

https://learn.microsoft.com/de-de/connectors/teams/#list-members

Since the query via MS Graph API works without any problems,

https://graph.microsoft.com/v1.0/teams/{team-id}/channels/{channel-id}/members

I suspect that there is actually just a minor problem in the connector -> the thread type "channel" is not recognized and taken into account correctly.

When will this problem be fixed? Is there a recommended workaround?

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msizec 14 on at

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The problem isn't fixed yet ...
Still can't use the "list members' connector with channel option

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Katie-Adams-Dev 3 on at

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Seconding the issue with the List Members connection; I get the same error message when using the custom value 'Channel', even though all the subsequent options appear, I still see an error message saying:
Flow save failed with code 'OpenApiOperationParameterValidationFailed' and message 'Input parameter 'threadType' validation failed in workflow operation 'List_members': The API operation 'ListMembers' requires the property 'threadType' to be set to one of its defined enum values '["groupchat"]' but is set to 'Channel'.'.

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