Since updating Remote Desktop Manager on Android to version 2026.3.0.21, RDP connections fail with the error: "0x80090308". Reverting to version 2026.2.3.2 immediately resolves the issue using identical settings. Device: Samsung S24U, Android 16.
Hello,
Could you try enabling/disabling Network Level Authentication (NLA) and let us know if that solves your issue ? You can do so by going to the RDP entry settings > Authentication, then checking or unchecking Enable Network Level Authentication (NLA).
Best Regards,
Frederick Simard
I have the same issue. Turning that off did fix it.