How to publish Exchange Server in Fortigate

[#1]

Hello, I configured exchange server behind fortigate ,The OWA is working properly and I can send email but cannot receive any email , I got this error " Sorry, no mailbox here by that name. (#5.1.1)" I just using Virtual IP , is there any special setting I missed ? thanks

[discoveryit]

to make OWA work you can just copy the VIP above and make one that forwards port 443 to the exchange. You can then add the HTTPS forward as a " Multiple Address" to the same policy that your Port 25 forward is using. Also make sure that you are not using multiple IP' s. Our exchange server has 1 IP for SMTP traffic and another for Web Traffic.