After connecting to the remote server, even if you select the “clipboard” function in the “local resources” tab, you still can’t copy and paste. The solution is found through Baidu, because the rdpclip.exe on the remote server doesn’t work properly. The solution is to open the task manager on the remote server, find the rdpclip.exe process, and close it.

Then enter rdpclip.exe in the start menu search box, press enter, and it will run again.