Delhi is 9.5 hours ahead of Montreal
There is no standard 8-to-6 overlap. Someone joins early or late.
Given Delhi is 9.5 hours ahead of Montreal, the realistic answer is that there's no convenient shared slot during normal business hours. Catch the edges of the day: the last hour for Delhi or the first hour for Montreal is usually the least painful option. Watch the DST gap — when Montreal changes its clocks and Delhi stays the same, this window slides by an hour.