The release notes for Symantec Endpoint Detection and Response (SEDR) 4.4 are available here: Symantec™ Endpoint Detection and Response 4.4 Release Notes
New issues discovered after the 4.4 release:
EDR 4.4 fails to display Help using the link within the EDR appliance console
https://knowledge.broadcom.com/external/article?articleId=192875EDR 4.4 removes any custom install self-sign certs for SEPM DB (added by support in a root session). The steps will need to be completed again per this KB document: