You want to know if CVE-2016-2183 SWEET32 (Birthday Attack) vulnerability has an impact on ITMS (IT Management Suite) and SMP (Symantec Management Platform) Server.
ITMS 8.7.x
ITMS doesn't use DES and 3-DES encryption algorithms since ITMS 8.0 release where we added FIPS support, hence there is no impact on ITMS 8.7 and later.