Hi Baran Şirin,
Thank you for posting your question in the Microsoft Q&A forum.
Based on my research, the behavior you are experiencing appears to be the same issue that many other users have reported over the past several years. According to multiple community discussions, Outlook seems to use its own printing engine and print styles, which can override Windows and printer driver paper source settings. As a result, there is currently no supported configuration that can force Outlook to always honor the printer driver’s tray or paper source selection.
While looking into this issue, I found several related threads where users describe the same behavior and share possible workarounds that you may want to review and try:
- https://learn.microsoft.com/en-us/answers/questions/4592370/outlook-doesnt-use-printer-shortcut-tray-or-accept
- https://learn.microsoft.com/en-us/answers/questions/4587120/outlook-365-not-saving-printer-preferences
I hope this information is helpful.
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