What happens with lease when property manager leaves

[Curt Bixel]

Last summer, I had a property manager place tenants in one side of a duplex.  The lease was between the property manager and the tenants and does not reference me at all.  Things did not go well between the property manager and the tenants, and I had to ask the property manager to move on.  

Due to a related issue, I actually had to help the tenants move from their side of the duplex to the other side, which had recently been remodeled.  

I am curious if the lease that was signed between the property manager and the tenants for the first side of the property would be considered still in effect.

If not, then, in Ohio, does it automatically revert to a month to month.