Hi Patrick

I think your solution is more than reasonable.

Usually the 'assigned to' field in the CMDB is used where the user is physically assigned to the CI OR has a strong connection with the machine similar to ownership.

A possible explanation for using the 'assigned to' field to store the last logged user can be the fact that the field wasn't used.

Usually the best practice suggest to re-use an existing unused field so everything makes sense.

Just one last consideration.

if you want to move on with your solution remember about the impact caused in using the new field.

I mean you need also to clean the 'assigned to' field for all the existing CIs where the field has been previously populated through the discovery, because from now on the field is dedicated to a completely different information.

Cheers

Robo