Show the Document Management pane at startup when:

"There is important status information": Checks the option "There is important status information regarding the document". | Unchecked: Unchecks the option "There is important status information regarding the document".
"The document is part of a workspace or SharePoint site": Checks the option "The document is part of a workspace or SharePoint site". | Unchecked: Unchecks the option "The document is part of a workspace or SharePoint site".

Supported on: At least Windows Vista
There is important status information:
Registry HiveHKEY_CURRENT_USER
Registry PathSoftware\Policies\Microsoft\Office\12.0\Common\DWS
Value NameShowDWSPaneAlerts
Value TypeREG_DWORD
Default Value0
True Value1
False Value0
The document is part of a workspace or SharePoint site
Registry HiveHKEY_CURRENT_USER
Registry PathSoftware\Policies\Microsoft\Office\12.0\Common\DWS
Value NameShowDWSPane
Value TypeREG_DWORD
Default Value0
True Value1
False Value0

office12.admx

Administrative Templates (Computers)

Administrative Templates (Users)