In a remote connection to ECS Windows 2012 server from a Mac desktop, the system prompts “Remote desktop connection is unable to verify the identity of the remote computer you want to connect to”.
Log on to the ECS by using the Management Terminal.
Click PowerShell in the task bar, enter the command
gpedit.msc, and press Enter.
Click Computer Configuration > Manage Template > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Security > Require use of specific security layer for remote (RDP) connections.
Double click Require use of specific security layer for remote (RDP) connections.
Check Enabled and select RDP for the security layer, and then click Apply > OK.
If the problem persists, open a ticket to contact Alibaba Cloud.