Hello,
Thank you for posting in the Microsoft Community forum.
You can try the following steps to troubleshoot the IPP printer issue:
1. Ensure that the Internet printing client is enabled for Windows Server 2016.
Choose Control Panel > Programs and Features.
Click "Enable or Disable Windows Features" on the left.
Expand Print and Document Services and select Internet Print Clients.
Click "OK" and wait for the installation to complete.
- The problem may also be that Windows does not trust or cannot verify the SSL certificate that the print server is using, or that the print server is using a self-signed certificate.
Please refer to the following guidance articles for troubleshooting:
Error occurs when adding an IPP printer - Windows Client | Microsoft Learn
Best regards
Jacen
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