BES Express 5 upgrade
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We are looking at upgrading our Exchange Server from 2007 to 2010. Currently we are using BPS 18.104.22.168 and I know I need to upgrade to BES Express 5 to work in Exchange 2010. I was wondering if it's possible to have both the BPS and BES server in the same organization and cut over one phone/one mailbox at a time. I was thinking of moving a mailbox over then reactivating their phone on the exchange 2010/BES Express 5 while keepiong the other mailboxes running on BPS/Exchange 2007. Has anyone tried this scenario?