If DelegateSentItemsStyle was added to the registry, delete it as it will prevent the server-side feature from working correctly. If you have Send as permissions on a user's mailbox, you need to use the DelegateSentItemsStyle registry key.
Hello, how can I open/access a shared exchange mailbox with Outlook Mac 2016 Preview Is there a similar open as in Outlook for Windows I mean all shared folders of the mailbox (not just the inbox). You can only use use these parameter on shared mailboxes. Outlook Mac 2016 Preview: open shared mailboxes. Set-mailbox mailbox-name -MessageCopyForSendOnBehalfEnabled $False
Set-mailbox mailbox-name -MessageCopyForSentAsEnabled $False To disable it for emails Sent As the shared mailbox, use this cmdlet: Set-mailbox mailbox-name -MessageCopyForSendOnBehalfEnabled $True To fix this issue, you can enable access to public folders for users and disable access to public folders for the shared. To work around the problem, move the shared mailbox to the on-premises environment. If the email was Sent On Behalf of the shared mailbox, use This issue occurs because Outlook tries to connect to the legacy on-premises public folders for the shared mailbox. Get-Mailbox -ResultSize unlimited -Filter | set-mailbox -MessageCopyForSentAsEnabled $True To enable it on all shared mailboxes, use this cmdlet: Set-mailbox mailbox-name -MessageCopyForSentAsEnabled $True To enable it for emails Sent As the shared mailbox, set the enable flag to true and run the cmdlet:
This setting can be enabled or disabled in the Office admin portal or using PowerShell. Yes, it's been a long time coming, but finally, all shared mailboxes will retain a copy of emails sent from the mailbox. Beginning with Exchange 2013 CU9, when a message is sent from a shared mailbox, the sent message can be stored in the sent folder in the shared mailbox without adding DelegateSentItemsStyle to the registry.