Jason,
I do not understand the powershell. I have an account in 365 & tried to sign into powershell using those credentials; I could not get in. But before I do go down this road I want to make certain I can do two things. From what you stated I have a shared mailbox with contacts & calendar associated with that box. Question: Once I update a contact in the shared box will that automatically update the contacts in both my & my partner's phones and desktops? The same question applies to the calendar. In the end I want to get my emails from my email box but all my contacts and calendar from the shared box.
Thanks for your patience,
Ben