Is my prayer acceptable in the office in the presence of a young male employee, knowing that I wear a pad due to a white discharge, and is it obligatory to remove it for prayer?

Your prayer is valid if it fulfills its conditions and pillars. You should strive to find a place where you are out of sight of men, while also being cautioned against mixed-gender work environments. The white substance, known as female vaginal discharge, is considered pure according to the more preponderant opinion. It is not obligatory to wash clothes stained by it, but it does nullify ablution (wudu'). If its discharge is continuous, you are subject to the ruling of one afflicted with incontinence, so you should perform ablution for each prayer after its time has begun.