** Fixed in ArcGIS 9.3**
Geocoding an address table from a Microsoft Excel spreadsheet or Object Linking and Embedding database (OLE DB) table against an ArcGIS Server Geocode Service is not supported. The following message may display:
"There was an error trying to process this table".
ArcGIS Server 9.2 requires an ObjectID field in the address table. If the field is missing, the RemoteAddressLocator may fail.
Geocoding addresses from an Excel spreadsheet or OLE DB table against an ArcGIS Server Geocode Service is not supported. Geocoding the Excel spreadsheet or OLE DB table against a Desktop or ArcSDE address locator is supported.