Hi, you cannot schedule channel meetings from Outlook today (unfortunately). When it comes to invitations to channel meetings it depends on if the user is a "subscriber" of the group or not. You would have to run this in PowerShell: Remove-UnifiedGroupLinks with the -Subscriber and -Links parameter.

https://docs.microsoft.com/en-us/powershell/module/exchange/remove-unifiedgrouplinks?view=exchange-p...

Ex. Remove-UnfiedGroupLinks -Identity "the group to remove user from" -LinkType Subscriber -Links xxx@xxx.com
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