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Domain trust relationship with separate exchange servers

Hi All
As per image below:

Is it better to have separate exchange server for Techtutorials.com and separate exchange for xyzabc.com

or
have one exchange at root domain for all domains ?

thanks

 forest
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aucklandnz
Asked:
aucklandnz
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2 Solutions
 
Chev_PCNCommented:
As you can have multiple address spaces hosted by the same Exchange infrastructure, I would recommend a single Exchange setup at your root. You will then have to set up all your MX records to point to your mail address.
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Muzafar MominCommented:
even i would suggest it would be easy to manage single exchange in a forest rather than havin exchange for each domain, to will need build trust between all your domains to have single exchange for all
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aucklandnzAuthor Commented:
thanks for your comments

Are they any advantages to have own exchange for a domain withing a forest ?

also when it comes to managing exchange .... does it mean that all exchange task related to techtutorials.com and xyzabc.com would have to be done by admin at root domain or it could be managed within location where domain is located.
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Chev_PCNCommented:
Even with a single Exchange organisation, you can delegate management rights to different accounts or users. Having individual servers per domain might give you greater redundancy, but an effectively designed single Exchange org would provide a good level of reliability.
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aucklandnzAuthor Commented:
Would you still extend exchange across sites for DAG or any other reasons ?
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aucklandnzAuthor Commented:
would it be possible to install exchange server at xyzabc.com as a part of root domain so it holds only databases for users within xyzabc.com and configure DAG with a copy at root domain ?
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Chev_PCNCommented:
Hi Auk.
One reason to spread your Exchange servers across physical sites would be redundancy - add database copies for each DB so that if you lose a site, then you can just mount the copies and have the users connect to the alternate.
Another reason might be if you have slow intersite links, then it's better to have clients connect to a local server to minimise traffic, although using cached mode in Outlook provides a good reduction in the amount of data transferred.
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aucklandnzAuthor Commented:
hanks for your comments guys
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