Exchange 2007/Office 365 Merger Coexistence

Our company has a 2007 Exchange server. We are merging with a company using Office 365. The decision on premise/hosted email is months away, each organization needs to maintain it's own email identity including mail flow (we are using different external
archiving products)
We'd like to implement common address book and calendar sharing by deploying Exchange 2013 on premise and configuring a hybrid migration scenario, but not actually doing the migration. 
A couple of questions I could not find in the documentation:
1) Is this a supported scenario?
2) Can we configure each unique email domain's routing individually? We like domain xyz.com to be centrally transported (go to and from premise connectors) and abc.com no to be (to and from cloud connector). Can't find this scenario explicitly stated as
being supported
3) Can we create unique address lists for each org? Management wants to have all users from both companies in the GAL but not have their groups be visible to each other.
Thanks
Jo

Hi psh8989,
According to your description, I know that you want to migrate public folder from Exchange 2007 to Office 365.
Since Office 365 is different from Exchange On-Premises, I suggest ask Office 365 Forum for help so that you can get more professional suggestions. For your convenience:
http://community.office365.com/en-us/default.aspx
However, I can also share some information for your reference : )
Based on my knowledge, Exchange supports moving your public folders to Office 365 and Exchange Online from Exchange 2007 SP3 RU10 or later. I notice that your Exchange server version is SP1, please upgrade to SP3 RU10 first and perform migration.
More detailed information to see:
Migrate legacy public folders to Office 365 and Exchange Online 
http://technet.microsoft.com/en-us/library/jj983799(v=exchg.150).aspx
Thanks
Mavis Huang
TechNet Community Support

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    http://www.msexchange.org/articles-tutorials/office-365/exchange-online/configuring-exchange-2013-hybrid-deployment-and-migrating-office-365-exchange-online-part12.html
    Disclaimer:
    Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure
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  • Exchange 2013 (Office 365) shared mailbox not staying up to date.

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    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]
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    TechNet Community Support

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    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]
    Jim Xu
    TechNet Community Support

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