Master sync in email on Samsung J500FN turned off, would like to turn on againon

[rotaxengine]

Hi you help please. I have just upgraded to 6.0.1 (not sure why but) Now the Master sync is turned off and I can not seem to turn it back on.

I have read the reply by B. Diddy to the same question but that was for the S5. I do not seem to have a "Sync toggle in the quick settings" along the top of the phone??

Any help please