It appears between SMP 7.1 SP2 MP 1.1 and SMP 7.5 SP1 (as well in SMP 7.6) that the 'Replicate Now' right-click option has been removed from the Roles Privilege tab. If you look under Settings>Security>Permissions>Settings view>Hierarchy, it is present as an option for 7.1 SP2 MP1.1 but not for 7.5 SP1 and 7.6. As well under Settings>Security>Account Management>Select Role>Privileges tab>Right Click Menu - Hierarchy, Replicate Now is present for 7.1 SP2 MP1.1 but not for 7.5 SP1 and 7.6.
Answer: This change was introduced during SMP 7.5 release.
The "Replicate Now" right-click option has been moved under 'System Privileges' section (under Settings>Security>Account Management>'Select desired Role'>Privileges tab) and no visible under the Settings>Security>Permissions>Settings view>Hierarchy tree as it used to be.
In SMP 7.5 we have replaced right click menu action with privilege 'Replicate Now'. It was done because right click menu action was used as privilege in NS code. So to eliminate this incorrect usage right click action was re-factored into privilege. However functionality of 'ReplicateNow' and it's availability to user was not changed. So if privilege 'ReplicateNow' is enabled then user can use it, if not then 'ReplicateNow' is invisible.