Access Manager Compatibility Issues

Release 5 Access Manager is backwardly compatible with Release 4 Access Manager. Note that Release 4 Access Manager was a major release that, except when configured to run in Legacy mode, broke compatibility with earlier releases. Likewise, Release 5 Access Manager, unless configured to run in Legacy mode, is not backwardly compatible with the Java ES 4 Access Manager running in Legacy mode.

Legacy mode is necessary to support other Java ES components, as well as older versions of Access Manager policy agents that which cannot interoperate with Access Manager in Realm mode. This incompatibility is an important upgrade consideration, and means in most Java ES deployments that Access Manager should be upgraded to Release 5 Legacy mode even when configured to run in Legacy mode.