You can access other users mailbox through Outlook on the web (OWA).
NOTE
- You must have full access to the others users mailbox
- Submit a service request and ask an administrator to grant you access to the desired user's mailbox
To access the other users mailbox, follow these steps:
- Log into https://outlook.office365.com/
- On the top right-click on your icon > Open another mailbox
- Search for the user you want to access
- Click on the user
- Click Open
- A new tab should open with the user's mailbox
If you run into further issues, please submit a support request at https://techsupport.wileyx.com/