LAN to LAN rule on sophos XG 210

Question

Hello Team, 
 
 I have Sophos XG210 and MIkrotik CRS each doing NATing. They are connected from 2 different providers. 
 On Sophos: 
 WAN:ether3 
 LAN: ether5(192.168.88.0/24) 
 From this LAN port is going to manageable switch for Hotspot users.

On MikroTik CRS: 
 WAN: ether1 
 LAN: Bridge with ports ether2-ether10(192.168.1.0/24) 
 From mikrotik ether2 is going to another manageable switch for Office users+Exchange server. 
 Users from mikrotik can access very well exchange server from both inside and outside.But something is different from Sophos users. People who connect using mobile broadband can access exchange server which is port forwarded. Is there a way to create a LAN to LAN on sophos to allow users from it(192.168.88.0/24) to access Exchange server which is on different subnet? 
 
 Thanks.

rfcat_vk · Answer

Hi, 
 assumption, they are on the XG networks? 
 source LAN -> ANY destination LAN -> ANY -> Allow ->log. 
 If you wish to refine the rule change the ANY to the network of the source and destination networks. You will NOT need a NAT. 
 If you require traffic in the the direction setup a rule with the reverse network addresses. 
 Ian 
 
 UPDATE:- being a lousy typist and spellchecker taking over - YOU WILL NOT NEED a NAT.