To access a device's ManageXR logs, you can use the Device Setup Tool.
Launch the Device Setup Tool and connect your device to your computer.
Next to your device, click the 3-dot button to open the other actions available. Click Pull ManageXR Logs.
The text output at the bottom of the Device Setup Tool will print out where the device logs were saved on your computer. Navigate to that location in your file system to find the log.txt files on your computer.
This location can be difficult to find on Mac Devices. Watch the video below for instructions on how to locate the correct folder.