Migrating from Exchange to Live@Edu - NOT a no-brainer

We've been getting a lot of email from people who are weighing the decision between on-premises Exchange and Live @ Edu. We got worried when we started picking up on two assumptions that a lot of them are making: that both Live @ Edu and on-premises Exchange 2010 are functionally equivalent and that should you decide to move between them it is a simple, no-brainer activity to shift from on-premises Exchange 2010 to cloud-hosted Exchange later on.

Disillusionment Time!

There are two things you need to be aware of at the outset:

1. Live @ Edu has limits compared to on-premises hardware (and this affects migrations disproportionately)
2. Going from on-premises hardware to Live @ Edu is just as major a migration as going from (say) Oracle Calendar Server to Live @ Edu.

We've dealt with the first issue already in this blog, including some differences from a coding perspective.
Now let's talk about going from on-premises to Live @ Edu:
First the voice of experience, in this case a user going from E2K7 to Live @ Edu:
http://nzschooltech.blogspot.com/2010/04/migrating-from-exchange-2007-to-liveedu.html
Yes, you CAN devise and execute your own migration process. But but do not plan on it being either simple or fast.
Second, we have the voice of authority, Microsoft, warning about this:
http://outlookliveanswers.com/forums/p/519/4961.aspx#4961
So Microsoft is working the IMAP mail migration angle (be sure to test how long it takes), but calendars, contacts, tasks are not included.

Third, we have the voice of Sumatra:
If someone is moving your calendars, ask if the meetings come over live with guest lists and responses intact.
Our general recommendation: If you're looking at migrating from a legacy system and considering going into Live @ Edu sometime down the road -- all indications are that it is better to make your end-point decision FIRST. It will save you tons of work down the road.