Appendix C: Mirroring Plesk updates Server
When it comes to deployment of a number of Plesk installations, we strongly recommend creating a local mirror of the Plesk updates server for Plesk distributions. This will allow you to significantly speed up Plesk deployments due to faster downloads. To create a local mirror, use the Plesk Mirror Setup Tool. For instructions on creating local mirrors of Plesk updates server, see the article https://support.plesk.com/hc/en-us/articles/213416569.