EDIT 10/27/2009: Please see the updated statement on this subject here.
Please be advised that Single Label Domain (SLD) support in the next version of Exchange is under review.
In February 20...
Updated Jul 01, 2019
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Next version of Exchange and Single Label Domain (SLD) policy under review
We have a forest root SLD with no significant issues arising from this other than the uncertainty over Exchange, so we fall into the category described of those planning to migrate only because of the Feb 2008 announcement. Given the number of MS and other products we have which don't support a domain rename, the options are - build a whole new AD and migrate to it.
However, having to wait for "the next few months" (on top of those we've already waited) for the possibility, however remote, that SLD's will be supported after all is playing havoc with our strategic planning.
Those of us left in this limbo have a right to be slightly embittered by Microsoft's apparent neglect of the issue. Our AD design with SLD came from a highly reputable MS consultancy partner in 2001. It's hardly a new type of configuration and, given the serious potential impact on those affected, MS really should have been on top of it long before now.
However, having to wait for "the next few months" (on top of those we've already waited) for the possibility, however remote, that SLD's will be supported after all is playing havoc with our strategic planning.
Those of us left in this limbo have a right to be slightly embittered by Microsoft's apparent neglect of the issue. Our AD design with SLD came from a highly reputable MS consultancy partner in 2001. It's hardly a new type of configuration and, given the serious potential impact on those affected, MS really should have been on top of it long before now.