Count meetings per person if person is present in any of multiple columns

[CGrunberg]

Hi,

I can't seem to wrap my head around how to calculate this using DAX. I hope one of you clever people would be able to help me.

I have a table of sales reps:

SalesRepName | MeetingOwner

I have a table of meetings:

MeetingID | MeetingOwner | Date

and a second table of meetings:

MeetingID | MeetingAttendeeCol1 | MeetingAttendeeCol2 | Date

I need a graph displaying how many meetings a given sales rep has attended either as an owner or as an attendee. All meetings have at least one person linked (the owner), but may have multiple that need to be counted, e.g. if a given meeting has both an owner and two attendees.

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One idea I've had is to unpivot the meetings table on the sales rep value leading to, instead of having one row pr unique meeting, instead having one row per unique meeting-sales rep and then counting sales reps from that table. But I was hoping for a prettier solution with less redundant data.