We have a Windows 2003 Server (a domain controller) that is running Microsoft Exchange 2003 and hosts ten mailboxes for the company. We have installed a new Windows Server 2012R2 (also a domain controller) box to be the file and application server for this small network. We have already moved everything to it and the old 2003 server just remains to run Exchange for now. When I decommission the old server, I do not want to buy Exchange and put it on the new server since it just doesn't seem necessary or cost effective. I am looking for a cloud based solution where I can just export the mailboxes to PST files and import them to the cloud solution. I also want the users to keep using MS Outlook since it is what they know. Would Office 365 hosted Exchange be the best solution for this? I am just curious what opinions are out there. The main thing is, I do want to be able to easily import the PST file to their cloud box so that it is centrally located and accessible.