Hello @Bharat Bhushan Nautiyal Nhan Nguyen Ron T
Thanks for the post and input. I was able to reproduce the issue on different browsers like edge, google chrome etc., There appears to be an issue at the azure end during the time this thread was reported. The issue has been resolved. I am able to change/update the auto-shutdown for the VMs in azure portal successfully. If anyone is still facing this issue, please tag me the comments and we can debug the issue offline.
Please accept as answer and upvote if the above information is helpful for the benefit of the community.