What action should be taken first when the Tanium Console is shown as unavailable?

When the Tanium Console is shown as unavailable, the first action to take is to check the status of the Tanium databases on the database server. This step is crucial because the Tanium Console relies on the underlying databases for operational data and user interface requirements. If the databases are down or experiencing issues, the console will immediately become unavailable, as it cannot retrieve or write the necessary data for users to interact with.

Addressing database issues upfront can help identify if the problem lies within the database configuration, connectivity, or performance, which are often the root causes of the console's unavailability. By ensuring that the databases are operational, you can often resolve the issue before proceeding to further troubleshooting steps.

While checking authentication logs, rebooting the server, and verifying network connections are important considerations for diagnosing the issue, they are secondary to verifying the status of the databases. If the databases themselves are not functioning correctly, those other steps may not lead to a resolution.