ServiceDesk Plus mail server couldn't be configured

Hello SD Support Team,

I'm working in one of the Govt. Entity in Abu Dhabi, U.A.E. I am in the process of analyzing SD Plus for our enterprise. I have been struggling to get ServiceDesk Plus to work. Every time I try to configure Mail Server, I am getting following error.

I am using Email type IMAPS and port 993. I did verify that the ports 993 and 443 are allowed to our Exchange Server through telnet. I also tried to follow your documentation mentioned in http://kbase.zohocorp.com/kbase/ServiceDeskPlus/TroubleShooting/file_100004.html. When tried to generate certificate, following is the error I got.

Please note that I cleared the mail exchange server name from above screenshot.

I am using version 9.200 and tried both databases, PGSQL and MSSQL 2014. But error remains same. I am attaching here latest log file for you to analyse the issue. Please help.

Thank you,

Abdul Gafoor