I'm thinking of setting up exchange 2000 with in an organisation. The organisation is small, about 150 users. 100 in canada and 25 in nashville and 25 in Michigan. We plan to setup a single AD forest for the three offices communicating over T1's xyz.com for example. We want to deploy exchange on top of that structure but have an exchange server in each office location so users don't have to cross the internet to read mail. Is this ok to do or do i need to setup multiple forests with multiple exchange organisations?