Migrating the Anypoint Enterprise Security (AES) features
In Mule 4, the Anypoint Enterprise Security module was split into different modules:
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Cryptography Module replaces the Mule 3 Encryption and Signature modules
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Secure Configuration Properties Module replaces the Mule 3 Secure Property Placeholder
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Validation Module incorporated functionality from the Mule 3 Filters Module
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OAuth2 Provider replaces the Mule 3 OAuth2 Provider
Please refer to the above modules documentation for information on how to migrate to Mule 4.