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6.6

Obtaining another company - sharing SMTP domain

Asked by MCPJoe in Exchange Email Server, Microsoft Identity Integration Server, Active Directory

Tags: Exchange, AD, SMTP

Lets assume for a minute that Company A is going to acquire Company B.  Once the legal process is complete, the two companies want to share a common SMTP namespace.  Both have separate AD domains and SMTP namespaces.  Company B is going to assume the SMTP namespace from Company A.  

What configuration in the back end would best support this arrangement?  An AD trust is no big deal, thats the easy part.  What I'm more interested in are options for sharing the SMTP namespace.  I know how this is setup in Exchange, but how do you best overcome the obstacles of the Exchange Gal?  If you share a SMTP domain between two separate Exchange orgs, the only thing I've seen that best deals with sharing a GAL is a very expensive suite of software from Microsoft.  Are there any other workarounds for this?  Also, are there any other potential issues to be aware of when considering a configuration like this?  

The ultimate goal would be to have the ability to move mailboxes back and forth between the two separate AD domains, while still sharing the same SMTP namespace.  Networking is not a problem, the appropriate VPN connections would already be in place.  Any tips/suggestions or links you'd recmomend on this type of scenario?  
[+][-]07/28/09 06:12 AM, ID: 24960263Expert Comment

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[+][-]07/28/09 06:30 AM, ID: 24960399Author Comment

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[+][-]07/28/09 06:32 AM, ID: 24960419Expert Comment

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[+][-]07/28/09 06:38 AM, ID: 24960470Author Comment

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[+][-]07/28/09 06:43 AM, ID: 24960519Accepted Solution

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About this solution

Zones: Exchange Email Server, Microsoft Identity Integration Server, Active Directory
Tags: Exchange, AD, SMTP
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Solution Provided By: -Q-
Participating Experts: 1
Solution Grade: B
 
[+][-]07/28/09 06:47 AM, ID: 24960558Author Comment

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[+][-]07/28/09 06:52 AM, ID: 24960607Author Comment

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[+][-]07/28/09 07:00 AM, ID: 24960690Expert Comment

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[+][-]07/28/09 10:45 AM, ID: 24963040Author Comment

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