Open another user’s mailbox in OWA 2010
You may need to open another user’s mailbox in OWA for several reasons. Assuming you want to access another user’s mailbox who just left the company and set up out of office replies, you can do so via OWA. Note: you must be given full access permissions by the administrator before you can proceed with this.
1. login to OWA using your own mailbox email address and password.
2.Click on your name in the upper right corner of the window.
3. Type the user name of mailbox you wish to connect too. You can also type your username.
4. At the upper right corner of the windows, click on options, click on create an inbox rule.
5.Click on automatic replies. Check send automatic replies and choose desired date/time for out of office replies. Make sure to check Send automatic reply messages to senders outside my organization if you want users outside your organization to get replies.
6. Click on save and you are done !