How do lease transfer after purchase of tenant occupied multifam

[Carlos Lez]

Dear fellow members,

I am seeking your help in (and possibly if you could help with docs or contracts I need the seller of a multifamily house to sign off so that a proper transfer of lease that the seller has with the tenant occurs so that it is now a lease between me (buyer of the property) and the tenant. We are trying to minimize or in the best case scenario not need the tenant to sign any paperwork.

My questions are;

1) The lease states the sellers address and specific details on where the monthly payment need to go.

2) The seller has retained a security deposit from the tenant. How will that transfer occur?

3) The closing of this sale will occur around the July 5th so it is mid month. How will the rent distribution occur?

4) When does the signing of these documents happen? Escrow?

Thanks in advance for a detailed response. I do apologize if these questions are naive, but I am doin this for the very first time. and the real estate is not helpful at all. He just says "the lease will automatically transfer at the point of sale". I want to be sure to get the right documentation in place.