Preview access - AWS Identity and Access Management
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Preview access

In addition to helping you identify resources that are shared with an external entity, AWS IAM Access Analyzer also shows you a preview of IAM Access Analyzer findings before deploying resource permissions so you can validate that your policy changes grant only intended public and cross-account access to your resource. This helps you start with intended external access to your resources.

You can preview and validate public and cross-account access to your Amazon S3 buckets in the Amazon S3 console. You can also use IAM Access Analyzer APIs to preview public and cross-account access for your Amazon S3 buckets, AWS KMS keys, IAM roles, Amazon SQS queues and Secrets Manager secrets by providing proposed permissions for your resource.

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