[RKDinOKC]

840 mailboxes on 2007. outlook.office365.com is cheaper than upgrading from 2007 to 2010 or 2013 including hardware, Especially if you consider 25Gig of mail storage for each user. Well, at least the quote was, not too sure after all their consultant fees to actually get everything moved.
License management is going to cause problems they are only getting 635 licenses. That math don't work where I went to school.

We have had our Russian office on office365 for mail for 4 years now, there is only one user though. We had her on our server and she gritched about connection being dropped all the time, put her on Russian Godaddy email service and she still gritched about connection and made me call tech support even though godaddy offered tech support in russian. So put her on office365 and found the connection problems were all her local russian ISP. Now she gritches about the web interface and doesn't want to bother with using Outlook. Had to have the Director of IT tell her tough nugies to shut her up.

Seems like if this consulting company does these migrations they should know how to set things so I don't have to sit thru two 3 hour conference calls of them mucking about with settings and it still not working. There are LOTS of online checklists.

Just have to go with the flow. Boss tells me they can blame the consultants so we don't get in trouble for problems. Guess that is a form of Job Security.

Have a LOT less problems with my Zipbang.com Kerio Connect Server and it does everything Exchange does and then some for half the cost.