Need urgent support

For urgent issues I'd suggest starting a case here with product support.

https://support.microsoft.com/en-us/hub/4343728/support-for-business

--please don't forget to Accept as answer if the reply is helpful--

Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows Server] Datacenter Management

Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

Please try the steps in this document and after each troubleshooting step, try reconnecting to the VM:

Reset Remote Desktop configuration.
Check Network Security Group rules / Cloud Services endpoints.
Review VM console logs.
Reset the NIC for the VM.
Check the VM Resource Health.
Reset your VM password.
Restart your VM.
Redeploy your VM.