There are no functional changes in the 2021 R2 ICWS API release.
This release of the Interaction Center supports the following ICWS feature versions. See Versioning for more information about ICWS versioning, including how documentation of an API includes its required feature version and how to query the Interaction Center at run time to determine what feature versions it supports.
Only the features listed below are supported by this release of the Interaction Center. Any other feature required by later versions of ICWS is not supported. Similarly, for the listed features, this release of the Interaction Center only supports the listed version of that feature, not any higher version.