Hi Rashid!
Thanks for Zooming, and apologies for the late reply to this thread.
In Webinar emails the subject for the Invite is take from the Webinar title. Have you considered editing the webinar Title when modifying the new time and date?
Would something like this work to help users notice the update, or are you asking for something different?
Image 1: Initial Webinar title and booking:
Image 2: Rename the Webinar title, then send new invites to the users:
Image 3: After editing, new calendar invites reflect the new Webinar Title
Given that new date/time for the webinar will need an adjustment to the calendar invites, would this method work for you or do you need the information added in a different part of the email?
If you need to get into more advanced branding or email setup you can do so via webinar email notification customization. We have an article on that here and that might help as well: https://support.zoom.us/hc/en-us/articles/203686335-Customizing-webinar-email-settings
Once again, apologies for the delay in a reply to your question, and thank you for Zooming!
If this reply has answered your question, please feel free to mark as a solution (and like if you are willing).
