switching from one email account to another

Hello,

I was hoping that somebody might be able to tell me if it is possible (as the administrator) to switch from one company email address, say admin@company.com to team@company.com without logging out and logging back in.  If so, I would be grateful to know the correct steps.  Hotmail has a linked email option, perhaps office 365 does as well?

Thanks in advance.

Guy