The purpose of this article is to provide steps to resolve Horizon Adapter connection error Failed to Test adapter instance. Reason - Invalid Credentials or Expired Horizon Connection Server Certificate triggers
Important: Take snapshots of each of the Aria Operations nodes before applying any of the steps below How to take a Snapshot of Aria Operations.
Before attempting the resolution below verify the interoperability between your version of Aria Operations and the installed version of Horizon management pack.
It is recommended to upgrade the management pack. Note: version 2.7.0 is recommended at this time due to an issue in version 2.7.1
Continue with the below steps if upgrading to the latest version of the management pack has not resolved the issue.
Add the horizon connection server to the /etc/hosts file
Horizon adapter instance was not collecting data
URL for 2.7.0 Provided below: