Error while running User Profile Import - Stopped-extension-dll-load

Question

Hi guys,
I'm receiving below error message in event viewer while running user profile import for the first time with event ID 6166:
The management agent "MOSS-" failed on run profile "MOSS_EXPORT_". The run step stopped because a configured extension for this management agent could not be loaded.
User Action
Verify that the extension is located in the Extensions directory. If the extension is present, confirm that the version of the .NET framework  that can run the extension is installed on the server and that a supportedRuntimes  entry in the configuration
files specifies that version. The synchronization  engine will not be able to load an extension that is built with a newer version  of the .NET framework than the version of the .NET runtime it is hosting.
At the same time , in miisclient "stopped-extension-dll-load" message for MOSS_EXPORT,MOSS_FULLSYNC, MOSS_DELTASYNC. Can any help to let me understand what will be causing this issue?
 Farm version: 14.0.6137.5000

Answer 1

Hi Sarath,
For this issue, I recommend verify the things below:
Check if the connection name of the Synchronization Connections created in User Profile Service Application has more than 55 characters. If yes, please rename the connection with less than or equal to 55 characters.
Check if the length of the full path to the dll called “Microsoft.Office.Server.UserProfiles.ManagementAgent” is
 greater than 160. If yes, then we can move the extension Microsoft.Office.Server.UserProfiles.ManagementAgent.dll to the folder c:\windows\assembly\GAC_MSIL and then do an IISRESET.
If above cannot work, please check ULS log for more detailed error message.
Best regards,
Victoria Xia
TechNet Community Support
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