The error The SCEP server returned an invalid response occurs when installing a profile using ADE
In this case, use a PC to factory reset the device and activate it again.
For how to reset the device, see the following page.
https://support.apple.com/en-us/HT201252
If the error is not resolved even after activating the device again, remove the device from ADE and update the OS version.
Then register the device with ADE again and activate it.
Steps:
1. Reset the device
2. Unassign the device from the ADE profile
3. Activate the device
4. Update the OS
5. Assign the device to the ADE profile
6. Reset the device
7. Activate the device
Last updated: April 18, 2024