Update register-existing-system.md

Author: kalyaninamuduri

articles/sap/center-sap-solutions/register-existing-system.md

@@ -160,7 +160,7 @@ This error happens when the Database identifier is incorrectly configured on the
 4. If this does not solve the issue, try updating the VM Agent using [this document](../../virtual-machines/extensions/update-linux-agent.md)
 5. If the VM agent does not exist or needs to be re-installed, then follow [this documentation](../../virtual-machines/extensions/update-linux-agent.md).
 
-To fix the Windows VM Agent, follow [this documentation](../../virtual-machines/windows-azure-guest-agent.md).
+To fix the Windows VM Agent, follow [Troubleshooting Azure Windows VM Agent](/troubleshoot/azure/virtual-machines/windows-azure-guest-agent.md).
 
 ## Next steps