I have a quick question about potential zimbra implementation in our organization.

We currently have exchange 2003 with about 130 users where only about 10 are using outlook connected to exchange and the rest uses OWA.

My question is, would it be possible to set up Exchange as primary for those 10 people that connect with outlook and Zimbra as secondary for the rest of the users (access zimbra web login). will those 10 people on old exchange have the ability to access the their exchange emails from zimbra through zimbra interface and will they be in syn between both servers? Thanks