Cannot stop people from creating appointments in my calendar

Hi Guys,

I have many users that have been able to make appointments in peoples calendars without their permission.  I've checked the prmission and they have no one on their permissions list except for them so it is very confusing as to why users are still able to do this.

Does anyone knwo why this is the case?  How can I stop people from doing this.


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MATTHEW_LConnect With a Mentor Commented:
Try finding that permission at the root level, deleagate rights by clicking on your organization, try checking the storage group, mailbox, server etc, until you see where that is being set.
Check the permissions in Active Directory user account properties, exchange advanced, mailbox rights, see if there is any strange permissions in there that may allow mailbox access.
mbavisiAuthor Commented:
I can see that everyone has full control from parent object.  I can't seem to take off the inherit permissions from the user.  
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