Agent Communication certificate
Can anyone assist me in below error?
Thanks in Advance.
The SMA has its own certificate for agent communication, so even the appliance is not using a certificate for the webUI the agent communication is always safe. This certificate is renewed regulary in an automated process. Outdated agents are not verified anymore if they can use the new certificate so they may be unable to communicate with the appliance. If you update the appliance you should also update the agents. Go to Settings| Provisioning| Agent Update to upload the latest Agent KBIN and enable the auto update for all devices. During the next check in cycles the agents are updated step by step to the latest agent. Outdated agents can be problematic (performance, avaiability, functionality, security), so they should be kept on the same version as the appliance.
Answer Chosen by the Author
My guess is that you have carried out an update on your SMA and the new version is now no longer compatible with some of your agents. For example you may have some 6.4.x agents that will no longer be able to communicate with a version 8.x SMA, so they will stop checking in. Once this has happened the only way to resolve the issue is to reinstall the agent on a newer version.