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Article ID: 2379367 - Last Review: August 26, 2010 - Revision: 1.0

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This article describes the compatibility of Microsoft Forefront products with Single Label Domains, Disjoint Namespaces, and Discontiguous Namespaces.


Single Label Domains

For a description of Single Label Domains, see the Single Label Domains topic in the Microsoft DNS Namespace Planning Solution Center. (

Disjoint Namespaces

For a description of Disjoint Namespaces, see the Disjoint Namespaces topic in the Microsoft DNS Namespace Planning Solution Center. (

Discontiguous Namespaces

For a description of Discontiguous Namespaces, also known as a noncontiguous namespaces, see the Discontiguous Namespaces topic in the Microsoft DNS Namespace Planning Solution Center. (

Microsoft Forefront

Single Label Domains

Because the use of SLDs is not a recommended practice, Forefront suite of products are not tested in this scenario. Therefore, there may be incompatibilities when Forefront products are implemented in an SLD environment.

In addition, Forefront Protection 2010 for Exchange Server (FPE) and Forefront Protection 2010 for SharePoint (FPSP) function with SLD configurations that are contingent on the underlying support of their Exchange and SharePoint versions.

Impacted Forefront products include the following:


Product Compatibility page on the DNS Namespace Planning Solution Center (

  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
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