Before you start
Open Apex Operations Center as Root.
Steps
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Find the account.
Open Accounts & Diagnostics and filter by account or domain.
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Choose Diagnose.
Use Diagnose beside the account.
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Choose the domain.
Select the domain to check.
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Run the checks.
Select Run checks. Opening the dialog never starts network checks on its own.
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Read each result.
Check DNS, the website response and the certificate separately.
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Follow the next steps.
Use the suggested action for any failed check, then open the website in your browser as a final check.
What you should see
Each check reports a result or explains why it could not run.
If something goes wrong
Results are reused for 30 seconds, and checks for the same domain cannot overlap. An unreachable domain can take several seconds to time out. The stored certificate expiry and the public HTTPS result can differ, for example behind a CDN; review both.
Related guides
Follow the steps visually
Choose a step to review its instructions and reference screen. Terminal output is an example.
Find the account
Open Accounts & Diagnostics and filter by account or domain.
Example only. Nothing runs on a server from this guide. Replace placeholders before using a command yourself.
Loading this step’s screenshot…
Sample-data capture of the plugin interface. Where shown, the orange outline marks the relevant control. Select the image to enlarge it.
Try the working Apex Operations practice panel
This runs the plugin’s interface code with sample data in your browser. You can try buttons and forms here. Results are simulated and reset when you reload the panel.