Help towards dynamically update attendees to meeting series

Question

Hi,

I have made a flow in Power Automate to automatically invite all the people from a Microsoft Entra group to a meeting series every day. However, I experience some things that I need help to solve.

The flow looks like above: So the CalendarID and EventID is inserted as variables from a blank created meeting in outlook. After this, the flow gets all members from an AD Group and is initializing a blank array.

The compose is looking like this, to create an array with all members in the ad group following the needed format in the API

After that, the flow are appending all the arrays together to one.

After that we are making a patch request to update the attendees looking like this.

Problem 1:

The flow overwrites the response from the attendees everyday, as that is something that I need to provide in the API.

Problem 2:

When entering the teams chat associated with the meeting the users are met with this message.

At the same time, when joining the meeting a message in the meeting for each members are shown "XXX has temporarily joined the chat" and after leaving "XXX has no longer access to the chat"

Please let me know if you have any solutions or need a better explanation for some of it

Michael