A kind of hosting mode in Exchange 2013?

Hi @ all,
I have a Windwos Server 2012 as DC with AD, DNS, DHCP. Also I have a Windows Server 2012 with Exchange 2013.
In the Active Directory I have different OUs for different groups of users. Every OU has it's own Administrator. And now I want, that the Admin only can create/see/edit/delete Mailboxes and Users out of his own OU. (like hosting mode in Exchange 2010)
I used RBAC and different scopes. Now each Administrator can only manage his own OU, but sees all.
I uses this example for my scope:
New-ManagementScope -Name "Executive Mailboxes" -RecipientRoot "contoso.com/Executives" -RecipientRestrictionFilter {RecipientType -eq "UserMailbox"}
(of cours with the my attributes ;) )
But it didn't work.
In summary, I want to realise a "hosting mode" in Exchange 2013.
I've tried an long time different ways, but nothing worked.
Can anybody help me?
dechecker
Sorry for my english, it's not the best. :)

Hello,
You can refer to the following thread:
http://social.technet.microsoft.com/Forums/nb-NO/exchangeserverpreview/thread/dfe648db-4d41-4bcd-ba4f-c2e1b4ec9435
Thanks,
Simon Wu
TechNet Community Support

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Hi
To be more specific refer below
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Hi,
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I have Exchange 2013 setup in a new environment (no migration) and it is working great except I just realized there is a big problem.
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I did some more testing.
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Were you able to figure what was going on with your first problem? we're seeing the exact same issue with one of our customers.

Migration exchange 2010 to hosted exchange 2013

Hello,
Tried to search for a good solution for what I need but always redirected to places of office365.
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