Hello Mian Lee Tan
Welcome to Microsoft Q&A Platform, thanks for posting your query here.
Based on the issue description, you're having trouble starting your Azure Virtual Desktops and connecting via the Remote Desktop App.
Regarding the issue with starting your AVDs as scheduled, can you please provide more information about the automation process you used? Also, did you receive any error messages or notifications when attempting to start the AVDs?
As for the issue with connecting via the Remote Desktop App, there could be a few different things causing this problem. One possibility is that there is an issue with your credentials. Have you tried resetting your password to see if that resolves the issue? Another possibility is that there is a problem with the Remote Desktop App itself. Have you tried uninstalling and reinstalling the app to see if that helps?
If neither of those solutions work, there may be a problem with the configuration of your AVD environment. In that case, I would recommend checking the Azure Virtual Desktop diagnostics feature to see if there are any issues that need to be addressed. You can also check out the troubleshooting section of the Azure Virtual Desktop documentation for more information on how to resolve issues (https://learn.microsoft.com/en-us/azure/virtual-desktop/troubleshoot-set-up-overview)
I hope this helps!