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You need to switch to Hybrid, then you can move the mailboxes natively. <br />
If you are going to deploy Exchange 2013 then the best option is probably to do that. Then engage with Microsoft support through the Office365 portal to ensure the integration is there correctly. You can then do a remote move mailbox request to bring the content down. <br />
<br />
Simon.
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You need to switch to Hybrid, then you can move the mailboxes natively.
If you are going to deploy Exchange 2013 then the best option is probably to do that. Then engage with Microsoft support through the Office365 portal to ensure the integration is there correctly. You can then do a remote move mailbox request to bring the content down.

Simon.

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My environment currently looks like this:<br />
<br />
Office 365: mailboxes with primary addresses @subdomain.mydomain.com and secondary addresses @mydomain.com. These mailboxes were all created in Office 365 and not moved from on-premises. <br />
<br />
On-premises: Exchange 2007 mailboxes with addresses @mydomain.com. <br />
<br />
We have Forefront Identity Manager 2010 synchronizing Office 365 and on-premises so each has mail-enabled contacts for the mailboxes in the other. We have no other integration between Office 365 and on-premises (no hybrid, or ADFS). <br />
<br />
Our goal is to move the mailboxes from Office 365 to the on-premises Exchange 2007 server. How do we do this?<br />
<br />
As a side note, we are upgrading to Exchange 2013 on-premises soon so if we needed that we can use it. <br />
<br />
Thanks!
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My environment currently looks like this:

Office 365: mailboxes with primary addresses @subdomain.mydomain.com and secondary addresses @mydomain.com. These mailboxes were all created in Office 365 and not moved from on-premises. 

On-premises: Exchange 2007 mailboxes with addresses @mydomain.com. 

We have Forefront Identity Manager 2010 synchronizing Office 365 and on-premises so each has mail-enabled contacts for the mailboxes in the other. We have no other integration between Office 365 and on-premises (no hybrid, or ADFS). 

Our goal is to move the mailboxes from Office 365 to the on-premises Exchange 2007 server. How do we do this?

As a side note, we are upgrading to Exchange 2013 on-premises soon so if we needed that we can use it. 

Thanks!

Migration of Office 365 mailboxes to on-premesis Exchange servers

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.