This hot fix can be downloaded from the SFDC Customer Portal Web UI, using your username and password for support.tibco.com.  Once logged on you can find the hotfix under Download Menu:

AvailableDownloads/BusinessWorks/Plugins/DCRM/6.4.0/hotfix-02

Listed below is a summary of updates included. Please refer to the associated read me document for any additional information

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Closed Issues in 6.4.0_HF-002 (This Release)

DCRM-828:Only endpoints that are registered for an entity type + event types combination should be invoked when an event occurs on that entity type and other endpoints should not be triggered.
 
Note: Applicable only for D365(Online & On-premise) and DCRM 2016 servers.
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