How Can You Get 30-Day Notice Before Imported ACM Certificate Expiry?
A company hosts its web applications in the AWS Cloud. The company configures Elastic Load Balancers to use certificates that are imported into AWS Certificate Manager (ACM). The company's security team must be notified 30 days before the expiration of each certificate. What should a solutions architect recommend to meet this requirement?
Community Insight
The question tests how to detect imported ACM certificates before expiry, and the trap is treating EventBridge as a date-based detector or assuming Trusted Advisor is universally available.
Imported ACM certificates do not renew automatically, so the security team needs a reliable expiry notification mechanism. This page establishes that AWS Config's acm-certificate-expiration-check rule with EventBridge and SNS is the correct SAA-C03 answer for 30-day advance alerts.
Most learners pick D because EventBridge can receive ACM approaching-expiration events, but option D's rule cannot itself detect a 30-day window and omits the AWS Config managed rule that performs that evaluation.
Community Discussion (175 comments)
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Expert Analysis
Why the Answer Is Correct
Option B matches AWS's documented pattern for ACM certificate expiration notifications: the AWS Config managed rule acm-certificate-expiration-check evaluates ACM certificates against a configurable expiration threshold such as 30 days. Imported certificates in ACM are not auto-renewed, so Config can flag them as noncompliant when they enter that window. EventBridge receives the AWS Config compliance-change event and targets an SNS topic for the security team. This gives a repeatable, per-account alerting mechanism without relying on support-plan-gated Trusted Advisor checks.Why the Other Options Are Wrong
Option A invents an ACM feature: ACM does not let you add a rule that publishes a custom SNS message every day starting 30 days before expiry. Option C uses Trusted Advisor, whose ACM certificate expiration check and CloudWatch metrics are tied to Business or Enterprise Support and are less precise than a Config managed rule. Option D is close but incorrectly says an EventBridge rule can "detect" certificates expiring within 30 days; EventBridge routes events, and the Lambda function would need additional expiry-evaluation logic that the option does not specify. The question asks for the recommended 30-day notification, and AWS Config's acm-certificate-expiration-check is the purpose-built control.Community Comment Notes
LeGloupier points directly to the managed rule "acm-certificate-expiration-check", which is the strongest technical confirmation for option B. TTaws makes a useful distinction that EventBridge is an event router, not an expiry detector, so option D is worded incorrectly. ChrisG1454 notes that both B and D appear in AWS guidance and says candidates must read them carefully, which is exactly why the Config-based wording wins here. Kaab_B cites the EventBridge-to-Lambda pattern, but that pattern starts from an ACM event rather than an EventBridge rule evaluating a 30-day window; Bayebrymo also observed that the linked article does not require Lambda for option D.Official Reference
Exam Strategy
For certificate-expiry questions, first identify whether the certificate is imported, because imported ACM certificates are your responsibility to renew. Then look for the AWS Config managed rule that checks expiration thresholds and an EventBridge-to-SNS notification path; avoid options that assume EventBridge can evaluate dates by itself or that Trusted Advisor is available without a support plan.
Frequently Asked Questions
Why is EventBridge plus Lambda (option D) not the best answer for ACM expiry?
An EventBridge rule routes events; it cannot itself detect certificates expiring within 30 days. AWS Config's acm-certificate-expiration-check performs that evaluation and reports noncompliance for SNS alerting.
Does acm-certificate-expiration-check cover imported ACM certificates?
Yes. The AWS Config managed rule evaluates ACM certificates, including imported ones, and reports noncompliance when they are within the configured expiry threshold; imported certificates are not auto-renewed.
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