Is a new lease needed? - I'm taking over properties w/ tenants

[Account Closed]

I'm set to close soon on properties with tenants. I've been provided by the seller what appears to be solid leases.

What're some best practices in this type of transition? 

• Does my new lease with my company's info have to mirror their terms?  Will my new lease be simply a "company name change exercise?"
• What terms can I change? 
• What terms can't I change?