transitioning baby to crib???

My SO and I have snuggled our baby boy to sleep each night, but soon he will be going to daycare and will have to sleep in a crib. He is 7 months old and cries when he’s in his crib. I try to comfort him, give him his pacifier and his lovey but nothing I’ve been trying really works.

How can I get him transitioned to sleeping in his crib?