A practical guide to completing your TLS certificate chainTL;DRSpring Boot Admin showed my application as REGISTERED → OFFLINE because the server certificate I presented during the health‑check was missing the intermediate CA.Re‑exporting the keystore (PKCS #12 / JKS) with the full chain—leaf + intermediate (+ root)—cleared the error and the instance now sits happily in the UP state.The SymptomRight after deployment my Spring Boot app registered...