I have a rather odd problem that built-in IPP drivers on a Windows Server 2025 print server are sending XPS data directly to Brother printers that do not accept it.
The weird part is if I print a document on the server or have the clients directly connect to the printers with IPP, then it properly submits PWG raster data to the printers. Both the Server 2025 and the Windows 11 clients are up to date. There is nothing in the event log on the clients or the server that is giving me any clues. The only way I found out what was going on was by taking a network capture of the IPP connection on the server. Then I found out that Windows is sending XPS data to the printers with the mime type image/pwg-raster which is then rightfully rejected with a document-format-error by the printers. Another oddity is depending on the phase of the moon and the alignment of the stars, it will work sometimes on some clients.
Has anyone encountered this or have advice on where to look?