Which agent synchronizes permissions on the Calendar folder inside mailbox? (4217295)

While running mailbox synchronization job - both Mail and Calendar agents are logging into the mailbox. Which one is synchronizing permissions on the default Calendar folder within the mailbox?

Both Mail and Calendar agents carry over permissions (ACL) on the default Calendar folder inside the mailbox. Mail Agent synchronizes permissions for all the mailbox  folders while Calendar Agent does it only for the Calendar folder along with his main task - synchronization of calendar items and updating Free/Busy for the mailbox.