DAX Count by Category when not found in related table

[whaz]

Hello,

Could anyone please help with DAX for the below?  We are using a live connection with a model like the below. 

I would like to count the number of Incidents assigned to each team.  Where team is blank, or the incidents doesn't appear in the Assignment table I want it to still appear in the row level total as blank.  For example, if you see below the Total of 10 is correct, but the Count of Incident ID for where Team is blank is 1 - I would like this to be 7 (I.e. INC001-4, INC008-9, and INC010). 

Any help will be greatly appreciated!