Configure your environment to view the device OS and OS version of managed unprotected devices
For the unprotected devices feature to display the device OS and OS version, you must configure the schema to allow the required attributes to synchronize from the domain controller to the Global Catalog.
On the Active Directory domain controller, complete the following steps to register Schmmgmt.dll and add the Schema option to the MMC:
On the domain controller, click Start > Run.
In the search field, type regsvr32 schmmgmt.dll. Click OK.
When the operation completes, click OK.
In the MMC, open the Active Directory schema and do the following:
Click Start > Run.
In the search field, type mmc.exe. Click OK.
On the File menu, click Add/Remove Snap-in.
Click Active Directory Schema.
Click Add.
Click Close. Click OK.
To update the attributes to synchronize to the Global Catalog, do the following:
In the left column of the Active Directory schema view, click Attributes.
In the attributes list, search for and click operatingSystem.
Select the Replicate this attribute to the Global Catalog checkbox.