Empty Assigned to-field in the agent inbox

Hi experts,

We recently upgraded from CRM 5.0 to CRM 7.0.

In the previous version when you navigated to the agent inbox in the interaction center, the field 'assigned to' was empty. This made it easy to look up transactions directly, via the object ID.

Now, in CRM 7.0, the assigned to field is always set to My Groups. If a user than enters a transaction number in the object ID, in most cases he won't find it, because there is a constraint from the assigned to field.

So, my question is quite easy: can we make the field empty again?

Thanks in advance,

Regards,

Mathias