After on-box upgrade from 8.1 RU7 to 8.5: Already received Communication profile with persistent enabled on 8.1 RU7 managed client, after Symantec Management Agent (aka SMA) upgrade to 8.5 doesn't read/establish persistent connection to NS.
Steps to reproduce:
Upgrade from ITMS 8.1 RU7 to 8.5
A fix has been added to our ITMS 8.5 RU1 release (targeted to January 2019).
Now SMA will be able to read/establish persistent connection to NS