Sophos Bridge Mode and Exchange 2019

Hi everyone,

this is my scenario:

Mikrotik firewall (with nat rules vs internal network services such as 3CX and Exchange with different public ip addresses)

Sophos (bridge mode)

Exchange 2019

I have installed Sophos since 2 days and it is working correctly except for Autodiscover or Owa

I have been searching dozens of threads but non e of them seems to tlak about my scenario (the bridged mode); I don't know if it should be the same as the routed mode (and if I might create certificates to let the sophos "speak" with the exchange and then point the mikrotik nats to the sophos and the exchange connector to the sophos as well)

Can somebode please help me with some documentation?

Sorry if this is a newbie question.