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Sean Killeen

Just a guy trying to get better at writing bios.

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Problem

I’m Running vCenter 5.1 and Windows Server 2008 R2. I notice a number of events in the event log with a source of “ADWS”, event ID of 1209. The event text reads:

Active Directory Web Services encountered an error while reading the settings for the specified Active Directory Lightweight Directory Services instance. Active Directory Web Services will retry this operation periodically. In the mean time, this instance will be ignored. Instance name: ADAM_VMwareVCMSDS

Cause

Apparently, VMWare doesn’t create a proper registry value for one entry, which causes ADWS to throw an error

Solution

To fix this:

  • Back up your registry.
  • Open regedit.exe
  • Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\ADAM_VMwareVCMSDS\Parameters
  • Note that the Port SSL field is a REG_SZ Rather than a REG_DWORD and is empty
  • Delete the Port SSL field.
  • Create a new field called Port SSL of type REG_DWORD
  • Double-click on that field and change the value to 636.

At this point, the errors should stop and your EventLog is now free from 1440 events a day.

References