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What if we are &quot;self- hosted&quot;? 
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also with the A record do i put this in the exchange server section or in the windows DNS side I am not technical so if you can give basic steps it would help alot thank you 
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also with the A record do i put this in the exchange server section or in the windows DNS side I am not technical so if you can give basic steps it would help alot thank you

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I am trying to point our exchange mail point to Zix for encryption they asked me to add in the Subdomain but they can not tell me step by step how to do this can someone give me directions on how to do this.<br />
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Thank you 
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I am trying to point our exchange mail point to Zix for encryption they asked me to add in the Subdomain but they can not tell me step by step how to do this can someone give me directions on how to do this.

Thank you 

microsft exchange subdomains

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

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Microsoft server applications are those applications developed specifically, but not necessarily exclusively, on the Windows Server platform. In addition to well-known products like SQL Server, Exchange, Internet Information Services (IIS), Microsoft Dynamics, Forefront, Lync and Sharepoint, they include applications like Skype, BizTalk, Hyper-V, Groove and Commerce Server. Server applications are managed with the Microsoft System Center.