ID Joining rule from Temp to Perm

Hi,

I was wondering if anyone else had this Issue with FIM/MIM

You have 2 types of Employees

1. Temporary

2. Permanent

So when a temporary employee becomes Permanent their Employee number becomes 2 Holograms to us thru our HR system, instead of just 1 ID with an updated contract.

We are also managing the Temps and Permanent thru Different MA's, as there is a different flow to each contract.

What is the Best way to overcome this, as our employee ID is the requirement and based on the Join rule.