Together with hh:mm(:ss) for times and +hh:mm for timezones. Don’t make me deal with that 12am/pm bullshit that doesn’t make any sense, and don’t make make me look up just what the time difference is between CEST and IST. Just give me the offsets +02:00 and +05:30, and I can calculate that my local time of 06:55+03:30=10:25 in India.
They probably have to recite a standard company line, gritting their teeth as you both know it’s bullshit.
I don’t envy customer service reps. Most of them probably didn’t apply for the job because they love Microsoft or enjoy the prospect of fielding frustrated customers’ calls.