How to hide all worknotes added on Incident from users not member of fulfillment group

[IAmIshan]

I have to hide all the worknotes updated on Incident from the users not part of assignment group. 

[IAmIshan]

Yes @Dr Atul - LNG. User should not be able to see all entered worknotes.

[Dr Atul - LNG]

Hi @IAmIshan 

Worknotes once entered it added as activity log and  I doubt it is easy to hide the activity logs only for worknotes.