Hi Vignesh. Yes, this is an interesting topic and I have also noticed this incorrect timestamp on Skype for Business Missed conversation sent to email. This issue was already raised to Microsoft couple of years ago but until now this was not yet permanently fixed. There's an existing thread regarding this: https://answers.microsoft.com/en-us/msoffice/forum/msoffice_sfb/skype-for-business-online-missed-con.... You may read it for your reference as well as there were a lot who already gave their feedbacks.