Hi,unfortunately Campaign Standard won't allow you to do so.Also there is no standard Aobe product to handle this case. You may do some customizations in Campaign Classic or AEM potentially to achieve what you are looking for.

Unfortunately the Control Panel only supports the UI usage or notifications.There is no API you could use and you can't access the info via the workflow. Though as it's a certificate deployed to the URL, you could just do a call to the URL and check the expiry date.e.g. something like what https://www.sslshopper.com/ssl-checker.html#hostname=www.adobe.com offers.If you build / find a service returning JSON, you could integrate that into a workflow using External API activity

Unfortunately as of today, there is no notification etc. on key expiry.The key may just vanish in the UI, so you need to handle expiry yourself (e.g. via Outlook reminders) Other option may be to issue keys with longer validity, e.g. via command line you could issue a key valid for 10 years.Though for security reasons, you should not use keys on PROD systems with very long validity

This is not related to the cookies but rather some issue since the last version.If you access the direct instance name e.g. https://test.campaign.com it would redirect you to the login pageWhen trying any sub-path, e.g. https://test.campaign.com/view/home, the page would only shown if you logged in before. Else the error is shown Some tickets are already logged with support.If it affects your instance, you may raise a ticket or else wait for a global fix to be deployed.