An expired domain takes email and your website offline at the same time, and lets someone else register it and receive your mail. A registrar transfer lock is a free setting that blocks one leg of a domain hijack.
A scan reports where your tenant stands on this check — pass, fail with a step-by-step fix, or not applicable if your licensing doesn’t include the feature. When Tenant Strike can’t read a setting with read-only access, it says unverified and gives you a one-command way to confirm it yourself — it never guesses.
Related External Attack Surface checks
Check your own tenant
Is your tenant covered on "keep domain registration healthy"?
One read-only scan answers it — this check and every other one in the catalog, each with a plain-English fix. 7-day Pro trial, no credit card.