You would to check on the Tracking subdomain. This would be t.mail.something.com or t1.mail.something.com, You can look it up in the Brand Settings for the subdomain

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://w...

Unfortunately today there is no real-time way to answer incoming SMS messages.It can be done via workflows though only with a scheduler in fixed intervals. So far I am not aware that any change in this area is on the near future roadmap

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 f...

Compatibility mode is  used if any externally created HTML is used.Did you try editing the mail in the legacy editor to do the image replacement?

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 ...

You can do it either using an enrichment as recommended above or else using a JavaScript content block.Within the content block you also can format the date in the desired format easily

The issue is that it will show you the internal ID of the workflow which by default you don't see inside ACS.Though you should be able to retrieve it by using a workflow query activity and an advanced mode condition like @ID = 50856839

The profileTrackingLog resource is an "internal" resource inside ACS.So the Update Data indeed does not allow you to do so as it blocks the internal resources in the UI.

Unfortunately no.The transactional message will be automatically created upoon first publication.But you can't define / choose a template in this step.