After upgrade from 8.1 to 8.5 release, Task Server fails to register. In this situation, Task Server had an account 'xxxx' which was a local account on both the SMP and Site Server.
Error code: HTTP status 401: The request requires user authentication (0x8FA10191)
Error note: Authentication failed, server refused to authenticate with provided credentials
Error note: Authentication failed, server refused to authenticate with the provided credentials or the user account is locked
1) Account used did not have correct permissions.
2) Recent Management Platform Upgrade
If step 2 is successful, there may be an issue with the Agent Connectivity Credential as specified. If the Account is on a Domain, the Domain must be referenced. i.e. Domain\UserName
The SMP was recently upgraded and the Task Servers do not have the new Symantec Management Agent and the updated Task Services install. Do the following: