Microsoft has retired the People Pane, but you can still get it back … albeit not in the Outlook desktop app itself.
- Log in to the corresponding Outlook web app. You can find this via
Account Settings-> below
Access this account on the web.If you do not have a corresponding Outlook web app, this method will not work
- In the Outlook web app, find the message you want to see people details for
- Mouseover the name of the person of interest in the email header
- To the right of the
Callicon, mouseover the
The ensuing dropdown menu provides much of the People Pane’s functionality, including finding previous emails, attachments, and more.
from DEV Community: jdrch https://dev.to/jdrch/how-to-restore-the-people-pane-in-outlook-365-35be