Hi.
Thanks for your query.
Noted the history and understood the concerns.
The problem of inability to pass motion in the morning but have it in the afternoon during office hours spoiling the job can be due to the following reasons and the solutions are thereupon.
The body clock got disturbed due to some reason that you have to find; may be due to late hours, disease, sickness,
stress,
anxiety, habituation gone and so on.
I would advise you the following:
To take
Dulcolax or such medicines at night before that stimulate passing motion in the morning.
What are the conditions that prevail in the afternoon that leads you for the need to pass bowel movement in the afternoon needs to be found out and curtailed so that your problem is half solved.
And find out what can cause motion in the morning, the moment you get
up and follow that routine.
I can understand this is bit difficult but not impossible.
Try your best you will get what you want.