Hello,
Thank you for posting in Q&A forum.
In the Exchange 2016 on promise environment running in Outlook 2016, you want to assign permissions to public calendars so that individual security groups can only delete entries for the corresponding group.
In the Exchange environment, permission control is usually based on roles rather than specific security groups. According to your description, the permission control you want to achieve requires more fine-grained control, which limits deletion permissions based on the members of the security group.
In Exchange 2016 on promise, it may not be possible to directly implement permission control for security group members to only delete entries of the same security group member. Usually, permission control is managed based on roles (such as editors, authors, viewers, etc.), rather than members of security groups.
Best regards,
Jill Zhou
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