Before we get started, we should point out that we have not tested this in practice. We are only basing this on public information (primarily from this article). Yet, it sounds reasonable, and feel free comment below and correct us. 
If you're thinking of moving into or out of Microsoft's Office 365, you're in luck. YippieMove can now help you migrate email data both in and out.
We've already talked about migrating to and from both Dovecot and Google Apps for Business without having to reset the users' passwords. In this post we'll talk about doing the same for Microsoft Exchange. 
Just like Dovecot, Google Apps also support logging in to users' email account without resetting the passwords. Unfortunately, this feature is not available for Google Apps Standard-users (i.e. free), but is restricted to Google Apps for Business-users... 
Let's face it -- having to reset the users' password when doing an e-mail migration is a big pain-point. End-users don't like having their passwords changed, and the tech-folks don't like the storm of support calls from frustrated users who can't get... Over the last few weeks we've seen an amazing growth in the number of users. Not only are we seeing a lot more single-transfers, but are also seeing an increased adoption of our Batch Migration-tool. We are really excited about this, and we think that...
