Release of tenant details

[Enzo Bellido]

Hey community, I have a bizarre question. I have been working with my property management  during the last year. I decided to end my relationship with them for several reasons and I'm now requesting all personal details from my tenants. They only provided me with their lease stating only their names but not their personal information as day of birth, etc. They are saying this is confidential information between the tenants and them and they can.not release that information to me unless I get a letter of authorization from my actual tenant. This doesn't make sense to me and didn't want to go back to my tenants to get their personal details.  Do I have any chance to request this information legally to them?

Thanks all for your help!