SP1+update+fix

First

Open MMC Add the ADSI edit snap-in Connect to the schema Browse to the “CN=ms-Exch-Resource-Schema” Open the properties and then browse to the “mayContain” attribute Open the properties of that attribute and delete “msExchResourcePropertySchema” <-- *note may need to force replication (Kainan)*

second Click **Start**, click **Run**, and then in the **Open** box, type: regedit Then press ENTER. Locate and click the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NTDS\Parameters On the **Edit** menu, click **New**, and then click **DWORD Value**. Enter the value data when the following registry value is displayed: Value Name: Schema Update Allowed Data Type: REG_DWORD Base: Binary Value Data: Type 1 to enable this feature, or 0 (zero) to disable it. Quit Registry Editor.