Policy
Store deleted items in owner's mailbox instead of delegate's mailbox
This policy setting allows you to store deleted items in the owner's mailbox instead of the delegate's mailbox. If you enable this policy setting, deleted items are stored in the owner's Deleted Items folder. For this setting to work correctly, the owner must also give the delegate permission to write to the owner's Deleted Items folder. If you disable or do not configure this policy setting, items deleted by a delegate are stored in the delegate's Deleted Items Folder instead of the owner's Deleted Items folder.
539095f6596aL_LocationofitemsdeletedbydelegatesRegistry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\outlook\options\general\delegatewastebasketstyle (enabled) = 4
HKCU\software\policies\microsoft\office\16.0\outlook\options\general\delegatewastebasketstyle (disabled) = 8Policy notes
This policy setting allows you to store deleted items in the owner's mailbox instead of the delegate's mailbox. If you enable this policy setting, deleted items are stored in the owner's Deleted Items folder. For this setting to work correctly, the owner must also give the delegate permission to write to the owner's Deleted Items folder. If you disable or do not configure this policy setting, items deleted by a delegate are stored in the delegate's Deleted Items Folder instead of the owner's Deleted Items folder.