Microsoft has released temporary mitigation info for a known issue that might cause print and scan failures on multiple Windows Server versions after installing July 2021 security updates on domain controllers. The known issue impacts printers, scanners, and multifunction devices using smart card (PIV) auth and non-compliant with CVE-2021-33764 hardening changes. Affected customers are advised to take the following steps on all domain controllers to mitigate ongoing printing and scanning issues. Microsoft has also addressed Windows 10 printing issues caused by changes introduced in the June 2021 cumulative update preview earlier this month.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-shares-mitigation-for-recent-windows-server-printing-issues/