Hello,
if you try to create an O365 calendar event for 2 or more recipients it seems that the system return an error, "one or more recipients are invalid".
You have this error if fill the field "Attendees Address".
Someone has experienced this behaviour? If you have few attendees, you can create as many calendar event in the flow as user you want to meet, but it is not so practical for medium to large users.
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Regards