HI Everyone, Working in the Windows 2003 Standard Server with Exchange Server 2003 SP2 Environment. We have two domains, xxx.com which is the domain the server resides in and is the primary domain. We obtained another company, yyy.com which is a domain the mail server (single mail server) accepts mail for and allows the users to connection from the yyy.com domain via SMTP accounts. We share calendars within the xxx.com domain with no problems. Users in the yyy.com domain want to utilize calendar sharing through exchange. My question is this. I want to set this up for them, allowing them full range of the exchange features. Can this be done with just one server or does a second server in their domain need to be configured? Thanks in advance, Ken