Ok, found the culprit : https://msrc-blog.microsoft.com/2021/08/10/point-and-print-default-behavior-change/
Windows 2019 RDSH server - regular user can't connect to printer anymore
lolix3
166
Reputation points
Since our recent patching round, regular users can't connect to shared printer anymore (driver already present on the RDSH server)...
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Limitless Technology 39,511 Reputation points
2021-09-06T11:56:24.697+00:00 Hello @lolix3 ,
It seems that you are affected by this behavior after the patch for PrintNightmare exploit.
Please check the next document for how to deploy printers after that: https://support.microsoft.com/en-us/topic/kb5005652-manage-new-point-and-print-default-driver-installation-behavior-cve-2021-34481-873642bf-2634-49c5-a23b-6d8e9a302872
Hope this helps you orientate,
Best regards,