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Hi @CU17030218-1,
I actually ran into a very similar requirement recently, so sharing what I found.
I was trying to trigger a Power Automate flow when a user joins a Viva Engage (Yammer) community using the Join button, but after exploring different options, I realized that there’s no direct trigger available for this event in Power Automate.
“When a user joins a community”
So unfortunately, the flow won’t fire automatically when someone clicks Join.
I ended up using a scheduled flow + Microsoft Graph API, and it worked pretty well.
Created a recurrence flow (runs every few minutes/hours)
Used Graph API to get community members:
Stored the previous member list (I used Dataverse)
Compared it with the latest list
Identified new users who joined
Triggered my logic based on that
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