The task will be dependent on the start date of the meeting.
Let’s say the meeting will be on Sept. 8, 2015 (regardless of time) - the task due date should be: Sept. 7, 2015 10:00am
should have exact time of 10:00am… It this possible with workflow?
Is there anything that I should enable to have a dropdown selection for exact time under actions?
You are unable to choose exact times with Workflow actions, however you could make the Task Due Date 24 hours before the Meeting Start date with the Action:
Due Date > Date > Start Date - 24 Hours
I have attached an image of this for clarity.
This should make the Task’s Due date equal 24 Hours before the Meeting Start date. If this is not enough time, you can increase the number of hours to a more suitable timeframe for the task.