Thank you, I did change SU01 setting to 12 hr but still getting same military time display. I think I didn't explain well, its when you save the meeting and a popup generates asking "Do you want to send email to non-employees". If I say yes, it open email view and I see the 24hr format in the body of email appear by default. That is what business is concerned and they want to see 12 hr format there.
Thanks