请８６３２１１老师给看一下， 关于H-1b transfer

Just got an info from international office of my next University:
' H-1b (for transfer and extension) receipt notice reveived. As a transfer H-1b, you are eligible to begin to work here now. '
My question is: after this H-1b receipt notice, should I expect to receive an approval notice for H-1b transfer and extension later?

many thanks!