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Can I install OCS into an Active Directory Forest deployed as a Single Label Domain?

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I just had a school that deployed a single label domain in Active Directory (e.g no .com or .edu for their domain namespace) ask me this question. I searched around but I couldn't find anything in the OCS supportability document.

The answer from the OCS product team is:

"According to KB 300684 most Internet registrars do not support this and Microsoft is blocking deployment of SLD with Windows Server 2008. We have not tested this scenario for these reasons and therefore will not support it if a customer deploys this way. They may try it out in a test lab but production deployment is at their own risk."

 

So to net it out:

 

If you have a SLD Forest and you want to deploy OCS you will be in uncharted waters. It certainly may work and I have heard of customers who have it working but it is not supported since we did not test nor do they test this scenario with service packs, hotfixes, etc.