In My scenario, i need to get three approvals from three users. Ther for I have used Assign A Task action on Nintex Workflow (O365 Workflow) and Whenever the request approval action fires I get the Task Email as usual. But I want to embed the Approve and Reject Button on to Nintex Form instead of opening the Task Form. Can anyone help me with this?
Well, that is feasible. To achieve that however do not use the "Assign task" action, but simply send e-mail to all users ("Send email" action) and then put buttons on your form ("Save and submit" ones) bond to a single numerical (for example) column. Then either use "Wait for item change" action, to hold workflow until someone clicks the button, what will write a specific value to that column or wait specific time.
Anyway - pause workflow, after it unpauses check if all answers are registered. If yes - move on, if not - go back to waiting.
You can do that with a state machine or a loop, with a boolean variable that indicates whether it should stop looping or not.