Retail MPOS Configuration in onebox

[dbndbanerjee11]

Hi,

While configuring the Retail MPOS, we are getting error as mentioned below:

Activate the MPOS:

Device Validation:

Associate external identity :

We have followed the steps mentioned in the below link:

https://docs.microsoft.com/en-us/dynamics365/unified-operations/retail/retail-modern-pos-device-activation

Can anybody have any clue on this error.