Resources Booking Delegates can not delete entries in rooms calendar

Question

Hello
We have some room booking delegates. all is working fine but for some VIP rooms, these delegates are booking the rooms directly in the room calendar from Outlook. They don't create a meeting. It works the rooms is properly reserved
The issue we have, appears  when the meeting change and the delegates just need to delete the booking to release the slot. He receives an error about not having enough rights ! The workaround, is to move the meeting during the night to release
the free slot.
The other workaround is the change the booking delegates as FullAccess, but we prefer having them just as Booking Delegates.
Is this a normal behavior. A booking delegate not being able to delete his own booking in a resource calendar ?
everything is configured though the Exch 2013 GUI interface and nothing in Powershell, so maybe they don't have enough rights
thanks for your help

Answer 1

Hi John
Many thanks for your answer, unfortunately it doesn't work
I set it on folder Calendar, maybe it is not the right place ?
Set-MailboxFolderPermission -identity MyRoom:\calendar -user testuser  -AccessRights PublishingEditor
I checked and both roles have delete rights
PublishingEditor   CreateItems, ReadItems, CreateSubfolders, FolderVisible, EditOwnedItems, EditAllItems, DeleteOwnedItems, DeleteAllItems
Editor   CreateItems, ReadItems, FolderVisible, EditOwnedItems, EditAllItems, DeleteOwnedItems, DeleteAllItems
Regards,
Guillaume