Our company will be performing a staged migration of our Exchange 2007 (Enterprise) server and I would like to migrate a (very) small pilot group of mailboxes to initially get our toes in the water. Once we are comfortable migrating a couple of test users the plan will be to migrate the rest of the company in batches.
My question at this point is how to get started - all documentation seems to infer that admin accounts have already been set up on the Office 365 portal, but I'm not sure how to go about this in an efficient manner.
Presently we have an Open license agreement with Microsoft, so I'd like any license purchases to be reflected. I'd also like the admin accounts set up so they are not overwritten etc when we do a DirSync.
Microsoft sales has been of little help, indicating that a Microsoft partner needs to be involved in this. We may involve a partner later on as we better discover the scope of the project but for now we do not have funds available to support this, and migration steps appear manageable once the admin (federation?) account has been set up.
I'd love some recommendations based on your expert experiences.