Context:

Some customers using EveryonePrint Google Cloud Print features received this email around Dec 2017 - Jan 2018

Hello Administrator,
You are receiving this email because Cloud-Ready printers in your organization may not have been updated by your printer manufacturers and are still trusting certificates that are expiring in the coming months. Your printer manufacturers were reminded about the expiring certificates in January 2017.
As a result of the expiring certificates, some Cloud-Ready printers in your organization using Google Cloud Print™ may stop working starting in March 2018. This notice alerts you to the possibility of interruption. To help you understand the potential impact to your organization, the numbers below refer to Cloud-Ready printer usage in xxxxx.com from December 1 to December 7:
• Print jobs to Cloud-Ready printers: nn 
• Cloud-Ready printers that received print jobs: nn 
• Users who printed to Cloud-Ready printers: nn 
The situation
These printers contain firmware that relies on expiring security certificates. They require an update from the printer manufacturer. If not updated, they will eventually appear as offline in Cloud Print and stop receiving print jobs. Unfortunately, Google cannot provide an update for your printer’s firmware–only the manufacturer can. Note, however, that if you are using a third party print solution provider to handle Cloud Print connectivity (e.g., PaperCut, PrinterOn), it is possible that you may not be impacted by this change. Please check with your third party solution provider.
Looking ahead
We realize how disruptive this may be for your users, which is why we are working to determine the extent of the issue. We will provide you with the most up-to-date information through the Help Center. You may also contact your printer manufacturer directly to find out if your printer will be affected and, if so, whether or not they have updated compatible firmware.
Next steps
1. Identify if your Cloud-Ready printers are impacted.
As Google performs tests, we will update a list of printers that we know are impacted or not. If your printer is not on this list, you can test it yourself by following these instructions.
2. For impacted printers, see if firmware updates are available.
You can get this information directly from the manufacturer (Printer OEM Contact List).
3. If the firmware cannot be updated, admins can pursue these alternatives to continue using their Cloud-Ready printers:
o Use a Google Cloud Print Connector.
o Switch to Common UNIX Printing System (CUPS) printing (for Chrome OS only).
o Switch to another existing print solution in your domain (for Windows/MacOS).
Read about each of the solutions and trade-offs (including platforms supported). See the table comparing scenarios and features supported by Cloud Print and CUPS printing.
We’re sorry for the inconvenience this situation may cause. We remain committed to working with you to identify affected printers and offer recommendations. If you have additional questions or need help, please contact Google support. Reference issue number 70039828.
Sincerely,
The Cloud Print Team

Issue:

Google is preparing to update some certificates used on the Google Cloud Print infrastructure; more detailed information is available at https://support.google.com/chrome/a/answer/7576108?hl=en&ref_topic=7577465

Resolution:

Nothing has to be changed on the EveryonePrint server side; Our engineering team tested EveryonePrint against the Google test servers that have the new certificates, as outlined here:
https://support.google.com/chrome/a/answer/7576008 

It is still possible to register new printers with the new certificates, and receive print jobs without any problem.