Hi @Yvan Tankeu Thank you posting the question here. It looks like you have posted a similar question on the forum - I'M NOT ABLE TO CREATE GROUP FOR DEPLOY A FIRMWARE ON ADU
I have provided the configurations needed to test out the Device update and the grouping on the thread. I appreciate it if you can go through the steps suggested and let us know if you need any additional assistance.
If the response helped, please do click Accept Answer and Yes for the answer provided. Doing so would help other community members with similar issue identify the solution. I highly appreciate your contribution to the community.