Page 390 of System Center Operations Manager 2007 Unleashed discusses modifying the Registry settings for the EnableADIntegration key on the RMS and management servers. This information was based on our own experiences and testing during earlier versions of OpsMgr 2007, as well as recommendations from Microsoft. Microsoft has since changed the behavior such that this Registry key hack is no longer recommended, and can actually cause problems.
We will be changing the information in the next printing of the book and the errata to say:
To complete the process of activating OpsMgr integration with AD, validate that the registry key HKLM\SYSTEM\CurrentControlSet\Services\HealthService\Parameters\ConnectionManager\EnableADIntegration is set to 0.This is the default setting.
There has been some confusion regarding how to configure this setting on management servers. However, do not change it to 1; the value should actually be the default configuration of 0. Changing the value to 1 is not required and actually may cause issues on the management servers.