Here is a scenario
2 small companies company A and company B that reside in the same office space currently have the following e-mail configuration.
Exchange Server A ( 2003 Standard Edition) running in the office equipment room. The Exchange Server A has full connectivity to an ISP.
Company B currently uses a hosted e-mail solution.
However the plan is for an Exchange Server to be introduced to serve Company B and stop using the hosted solution. Exchange Server B ( 2003 Standard Edition – although could be upgradeable to Exchange 2007 standard edition ) will be not be run in an office but in a remote data centre in the same country.
The reason for this change is so
1. A user can retrieve historical e-mails at will from local back ups if required from both companies.
2. The same user can view calendars from both servers using one client ( Outlook ).
This user works remotely or in the office.
Each company has its own e-mail address convention i.e. firstname.lastname@companya.eu and firstnameinitial.lastname@comapnyb.com
Is there a configuration that will achieve this functionality ?