Upgrading from Exchange 2003 Bridgehead servers to Exchange 2010 Transport Hub servers for routing SMTP only

Our company moved from on-premises Exchange 2003 to Office365 and only have 4 Exchange 2003 servers on-prem that we use for Routing email from application servers to Office365. We need to migrate these servers to Exchange 2010 then to Exchange 2013 and
only route email only. Is it possible to upgrade to Exchange 2010 by installing the transport Hub & Mailbox server options only? Our OAB and EWS services come from the CAS servers located on Office365 so we should not need a CAS server to set up Transport
rules or route mail would we? Any assistance with this would be greatly appreciated! - Thanks, DWB
Dave

Since it is not internet facing we will not have to worry about configuring an Internet Domain Name when installing the first server, correct? in my planning I was going to
install the Exchange 2010 CAS/Mailbox/Transport Hub roles on one server, then upgrade it to Exchange 2013. Once this is completed I'll then install the 2 mailbox role servers in one Datacenter, and 3 more in our DRP DC. If something happens to the
primary Datacenter I would want it to fail over to the other site. For this I would have to install another CAS/mailbox server in the secondary DC. Would this plan sound about right? Since we moved to Office365 in 2010 I have not had a chance to deal with
actual servers except for the Exchange 2003 servers we still have on-premises. Each of these are located in 4 Regional offices along with single Windows 2008 R2 servers using only the IIS SMTP service for routing mail from on-prem application servers
and print/scanners which email back to the users. The plan is to move to a routing system which will provide both MTA and redundancy if one has an issue.
Dave

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Thanks for all the helpful feedback, everyone. Here's an
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From the problem description, I understand that you would like to migrate Exchange server 2003 on Windows Server 2003 to SBS 2011.
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James Xiong
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What are the steps to follow ?
is there any docs/links treat this subject ?
Regards

Hi,
You can use FIM for GALSYNC.
REF:http://setspn.blogspot.in/2010/05/global-address-list-synchronization-gal.html
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Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

OUTLOOK 2013 permission shared calendar Free/Busy doesn't work for some the users Exchange 2010 and Exchange 2003 that use outlook 2007/2010

Hello,
We are in coexitence organisation (transition Migration) Exchange 2003 sp2 and Exchange 2010 sp1.
Users in Exchange 2003 use outlook 2007 and outlook 2010
Users in Exchange 2010 use outlook 2007, outlook 2010 and outlook 2013.
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Hi,
Does this issue occur on Outlook only or both Outlook and OWA?
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Mavis Huang
TechNet Community Support

Exchange 2003 will migrate to Exchange 2010 or Exchange 2013

Hi,
Exchange server is on exchange 2003 on windows 2003 R2.
I had an architecture of parent & child domain controllers, Where parent company is closed Down. But we have an additional Domain Controller
of parent DC in our premise.
Due to this fact exchange organization is also unavailable & cannot make modification on my exchange server configurations (Global Settings, such as changing recipients attachment restrictions, everything is grayed out).
Is there any way where we can have staged migration. I mean can I keep old & new server running together & keep few users on new Exchange organization & rest of them be on an existing server itself. (I tried testing this too, but email delivers
to mailbox store, so, it checks a name & say “Mailbox not available”)
If I create a new domain environment, I have challenge of migrating users (This I can achieve with ADMT, but actual story starts with mailbox migration)
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So, you have exchange 2003 which is inaccessible! Database files .EDB and .STM is there, but Mailboxes are not available.
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This is a cross forest migration. Which exchange you are planning to install in new environment? I would suggest 2013.
The only available option you have (As current environment is Inaccessible), Export the PST from EDB files.
Create Mailbox on Exchange 2013 and Import the PST.
Do you have Public Folder Database?
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Cheers,
Gulab Prasad
Technology Consultant
Blog:
http://www.exchangeranger.com    Twitter:
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Note: Posts are provided “AS IS” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.

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Upgrading from Exchange 2003 Bridgehead servers to Exchange 2010 Transport Hub servers for routing SMTP only

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