2 exchange servers…

we have 2 exchange servers that has nothing to do with the other till today. We are not linking the 2 up but we just want to give a user access to certain items like calendars on the other server without her actually logging into that domain. We just want to able to get access to calendars that are being created in MS-Outlook in one of the exchange servers. By the way, i think i should mention that both servers have MS-Outlook as the email client. Thank you…