I updated my Samsung Galaxy S a few days ago to Froyo, 2.2. Along with it came an update to the email app that when i entered my work's Exchange details it said that for this to complete the Exchange server needed 'admin' access. If i go itno a new menu in my settings it shows any apps that have admin, currently only this email account can do it.
Now, i'm unsure if the connection to Exchange will still work if you say that it cannot have Admin access, but it does give you fair warning. In 2.1 it didn't do this.