Table of Contents


OVERVIEW / PURPOSE
The purpose of this wiki page is to discuss an installation error that you may come across while installing the Microsoft Forefront Identity Manager Synchronization Service Engine, and provide information on how to resolve the issue.

PROBLEM STATEMENT
You may have one of a couple different scenarios that we have encountered in support when it comes to this error message.  Essentially you are executing an installation or an upgrade of the Microsoft Forefront Identity Manager 2010 Synchronization Service Engine and you receive the below error message pop up in the GUI.

ERROR MESSAGE
Error 25070.Error connecting to database FIMSynchronizationService. Invalid class string

WINDOWS INSTALLER LOG
MSI (c) (F4:B0) [14:50:44:802]: Doing action: GetGroupNamesFromDB
Action 14:50:44: GetGroupNamesFromDB.
Action start 14:50:44: GetGroupNamesFromDB.
MSI (c) (F4:4C) [14:50:44:849]: Invoking remote custom action. DLL: C:\Users\MYUSER\AppData\Local\Temp\MSI652B.tmp, Entrypoint: GetGroupNamesFromDB
Error 25070.Error connecting to database FIMSynchronizationService. Invalid class string
MSI (c) (F4!2C) [14:50:55:146]: Product: Forefront Identity Manager Synchronization Service -- Error 25070.Error connecting to database FIMSynchronizationService. Invalid class string
Action ended 14:50:55: GetGroupNamesFromDB. Return value 1.

CAUSE
The reason this happens is because the Microsoft SQL Server hosting the backend Microsoft Forefront Identity Manager 2010 database called FIMSynchronizationService is remote from the FIM 2010 Synchronization Service Engine.

RESOLUTION
Download and Install the Microsoft SQL Server 2008 Native Client onto the FIM 2010 Synchronization Service Engine machine.

ADDITIONAL INFORMATION / RESOURCE WIKI

FIM LANDING PAGE: Resource Wiki Page Index