To access Certificate Manager, click the Start button, type certmgr.msc in the search field, and click the Enter key.
To resolve unable to copy/paste in RDP - Restart Clipboard rdpclip.exe process.
- Load up task manager (right click taskbar and select Task Manager)
- Go to the Processes Tab Select rdpclip.exe
- Click End Process
- Go to the Application Tab Click New Process
- Type rdpclip
- Click Ok