EDIT 03/26/08: Please see our later post on this subject for the location of updated prerequisite check XML file. Summary This is a follow-up to an earlier post: Single-label Domain Names and Exchange Server 2007 SP1. Please refer to it for background information on this issue. After investigating Exchange 2007 Service Pack 1 installed in an Active Directory domain with a Single-label Domain (SLD) name, Microsoft has changed the Setup prerequisite rule for SLDs from an Error to a Warning, thereby allowing Service Pack 1 installation to continue in SLD environments. There are a few items that I want to point out:
Set-EmailAddressPolicy "Default Policy" -IncludedRecipients AllRecipients
Set-EmailAddressPolicy "Default Policy" -enabledPrimarySMTPAddressTemplate "%email@example.com"
Domain Rename - best option (if you can use it) Microsoft strongly recommends that you move off of your single-label domain and transition to an Active Directory domain with a fully qualified domain name. Some of the other challenges with this configuration include:
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