There are many occasions where shared mailboxes are required and users of that mailbox have Send As permissions.

However sometimes the shared mailbox sent items don’t display in the sent folder, which can be frustrating when other team members require access to what has been sent.

This can be fixed quite simply  by adding a registry item called DelegateSentItemStyle on the local machine.

Note: Outlook must be configured to run in Cached Exchange Mode.

1. Open regedit from the run command box and navigate to the subkey below:

HKEY_CURRENT_USERSoftwareMicrosoftOfficexx.0OutlookPreferences

(xx.0 – Office 2016 = 16.0, Office 2013 = 15.0)

2. Create a new DWORD value named DelegateSentItemStyle and modify the ‘Value data’ to 1 and click ok to save changes.

Re- open Outlook and new sent items from the shared mailbox should now appear in the ‘Sent Items’ folder.