An exception occurs in Exchange Management Console when you preview AddressList in an Exchange Server 2007 environment

This snap-in performed a non-valid operation and has been unloaded. To continue working with this snap-in, restart MMC or try loading the snap-in again.

Exception Type:
Ststem.Management.Automation.PSInvalidCastException

Exception Message: Cannot convert value "fixe.com/Users/DG1" to type "Microsoft.Exchange.Data.Directory.ADObjectId". Error: the string "five.com/Users/DG1" does not represent a valid distinguiched name."
at System.Management.Automation.LanguagePrimitives.IsConstructorTypeConversion(Object valueToConvert, Type originalType, Type resultType, Object& result)
at System.Management.Automation.LanguagePrimitives.ConvertTo(Object valueToConvert, Type resultType, Boolean recursion, IFormatProvider formatProvider)
at Microsoft.Exchange.Configuration.Tasks.Task.ConvertValueFromString(Object valueToConvert, Type resultType)
at Microsoft.Exchange.Data.QueryParser.CreateRelationalExpression(ComparisonOperator op, String prop, Object val, Boolean useWildchars)
at Microsoft.Exchange.Data.QueryParser.yyparse() at Microsoft.Exchange.Data.QueryParser..ctor(String query, ObjectSchema schema, Capabilities capabilities, EvaluateVariableDelegate evalDelegate, ConvertValueFromStringDelegate convertDelegate)
at Microsoft.Exchange.Configuration.Tasks.MonadFilter..ctor(String filterText, PSCmdlet cmdlet, ObjectSchema schema, Capabilities capabilities)
at Microsoft.Exchange.Configuration.Tasks.MonadFilter..ctor(String filterText, PSCmdlet cmdlet, ObjectSchema schema)
at Microsoft.Exchange.Management.SnapIn.Esm.Recipients.RecipientFilterControl.OnPreview(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)