I know this question is answered, but it is still an issue. I reinstalled MSCRM, installed rollup 6-11 and checked MSCRM working fine. After installing Rollup 12 or 13, I got this error. I rebooted a lots of time, this error is still there. I use IL Disassembler to open the C:\Program Files\Microsoft Dynamics CRM\Server\bin\Microsoft.Crm.dll file. I can't find the 'Microsoft.Crm.MapOrgEngine' class, which can be found in Rollup 11's Microsoft.Crm.dll file. What's wrong (file corrupted? I have download the Rollup 12/13 many times)? Please help me,
Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: Could not load type 'Microsoft.Crm.MapOrgEngine' from assembly 'Microsoft.Crm, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. (C:\Program Files\Microsoft Dynamics CRM\CRMWeb\web.config line 12)
Source Error:
Line 10: <httpRuntime executionTimeout="300" maxRequestLength="8192" requestValidationMode="3.0" encoderType="Microsoft.Crm.CrmHttpEncoder, Microsoft.Crm" />
Line 11: <httpModules>
Line 12: <add name="MapOrg" type="Microsoft.Crm.MapOrgEngine, Microsoft.Crm, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
Line 13: <add name="CrmFederatedAuthenticationModule" type="Microsoft.Crm.Authentication.Claims.CrmFederatedAuthenticationModule, Microsoft.Crm, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
Line 14: <add name="CrmSessionAuthenticationManager" type="Microsoft.Crm.Authentication.Claims.CrmSessionAuthenticationManager, Microsoft.Crm, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
Source File: C:\Program Files\Microsoft Dynamics CRM\CRMWeb\web.config Line: 12
--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.276