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We are planning the merger of 4 companies. Each company is currently using a separate domain address. We want to utilize one of the existing domain addresses (abc.com) as the permanent domain address. The domain address abc.com is currently managing mail using a pop type service, and does not currently manage their own exchange server. The other 3 companies do. Moving abc.com onto an exchange environment will be a nice upgrade for them.<br />
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What is the best practice configuration to merge all 4 companies onto the abc.com domain address?<br />
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The initial suggestion has been to select one of the existing exchange sites to receive all abc.com mail. If the recipient address exists in that organization's AD, it should be delivered locally. If it does not exist, it will forward the mail to the next site, and so on, until the mail gets to the last designated server. This site will be designated as authoritative for abc.com, meaning if the designation mailbox is unknown, it will generate an NDR.<br />
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Would we also need to configure all organizations to all relay our outgoing mail through one server to make reverse DNS work?
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We are planning the merger of 4 companies. Each company is currently using a separate domain address. We want to utilize one of the existing domain addresses (abc.com) as the permanent domain address. The domain address abc.com is currently managing mail using a pop type service, and does not currently manage their own exchange server. The other 3 companies do. Moving abc.com onto an exchange environment will be a nice upgrade for them.

What is the best practice configuration to merge all 4 companies onto the abc.com domain address?

The initial suggestion has been to select one of the existing exchange sites to receive all abc.com mail. If the recipient address exists in that organization's AD, it should be delivered locally. If it does not exist, it will forward the mail to the next site, and so on, until the mail gets to the last designated server. This site will be designated as authoritative for abc.com, meaning if the designation mailbox is unknown, it will generate an NDR.

Would we also need to configure all organizations to all relay our outgoing mail through one server to make reverse DNS work?

Corporate Mail Merger

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.