Problem with resolving Active Directory Domain and Email with DNS

Hello,

I've a problem with my company DNS infrastructure, because the Active Directory Domain name and the email are the same, for example Domain name: Domain.local and the email domain is: user@domain.local, the email is hosted with Office 365, and when i try to set the email account in Outlook I'm not able to contact the server. 

What can i do to solve it?

Thank you in advance