On the ..\AU_Data\AU_Log\TmuDump.txt, you see the following error message:

"UpdateManager endwith 69 (450000): ActiveUpdate self integrity check fail."
 

The "ActiveUpdate self integrity check fail" error usually appears when necessary certificates are missing. As a result,  the updates cannot be validated and will fail.

For endpoints that do not have the required certificates in their trusted certificate stores, the following issues may occur:

• The agents remain in an "Updating" state and do not receive their pattern updates.
• The server cannot verify the computer's digital signatures during Inter-Process Communication (IPC).
• The installation of the Data Protection Module may fail