Outlook shared mailbox not updating
Accounts, I see my MSA account listed as "Outlook" and can firm it's using a Hotmail server to sync.When I try to add another account in Windows 10 for Exchange using the same email, it tells me that email is already in use.For more information about Exchange server permissions, see Managing Exchange Server Permissions In order to share Outlook subfolders with another user, you need to give them the desired permission (at least Reviewer) to the folder and at least Folder visible permission to every folder above the shared subfolder.Right click on the shared folder and choose Properties.It's easy to share the default folders in your Microsoft Exchange mailbox: just give your co-worker permission to the folder.They can view the contents using the File, Open, Other users folder command.This setting can be enabled or disabled in the Office admin portal or using Power Shell.To enable or disable it in the Office 365 admin portal: You can only use use these parameter on shared mailboxes.
Share [folder name] to open the sharing invitation.
When you send a message from the shared mailbox, the sent message goes into your own Sent Items folder.
By default, sent messages are stored in your own mailbox, not the shared mailbox and the Delegate Sent Items Style registry value is used if you want to store the messages in the shared mailbox Sent Items folder.
If you have Send as permissions on a user's mailbox, you need to use the Delegate Sent Items Style registry key.
If Delegate Sent Items Style was added to the registry, delete it as it will prevent the server-side feature from working correctly.