Restoring backup on DEP device created ‘Error: Not found in keychain’

It looks like the Time Machine restore has messed up your MDM enrollment. I think a fresh dep enrollment is the only option, but in that case, you will still have to deal with the restoration that created this situation in the first place.

Hello @benjamin-franklin,  

Thanks for reaching out to us with your query. 
 
Time Machine backup is in fact the reason for this root certificate discrepancy as Sarah stated. But instead of repeating the whole enrollment procedures, you can retroactively update the DEP enrollment with a single terminal code.  

Open the Terminal app on the device and enter the following command:  

Now, enter the device passcode in the Terminal when asked. This will automatically download an MDM profile on the device; try installing this profile. The new profile will update the previous one, and the device will get re-enrolled without wiping.   
 
Hope this was of help.  
Nora Lang 
Hexnode UEM  

• This reply was modified 2 years, 7 months ago by  Nora Lang.
• This reply was modified 2 years, 7 months ago by  Nora Lang.