Symantec Endpoint Protection (SEP) automatic exclusions are not present for Microsoft Exchange 2013/2016
Endpoint Protection versions prior to 14.2 RU2.
This issue is fixed in Symantec Endpoint Protection (SEP) 14.2 RU2. For information on how to obtain the latest build of Symantec Endpoint Protection, see Download the latest version of Symantec software here.
ESCRT-2143