Dear Colleagues, I hope you are doing well, I already configured my email server to support EAI as the following :- [cid:image001.png@01D24319.CF868A30] What I noticed is :- 1) Cannot send an email from outlook to my EAI mail box , mail was rejected at the first point at sender mail server as the following :- [cid:image003.jpg@01D2431A.848CDB00] 2) I tried to only change the local part of email address to be in punny-code "xn--*" , the email delivered correctly to my EAI mailbox as the following :- [cid:image005.png@01D2431A.848CDB00] 3) Arabic Email address displayed correctly at outlook 2016 in case of you try to send an email like the following :- [cid:image006.png@01D2431A.848CDB00] 4) Arabic email address local-part does not displayed correctly if outlook receives an email from EAI mail server account like the following :- [cid:image007.png@01D2431A.848CDB00] Any idea !!! I will be happy to receive any comment to make the system working well. Thanks in advance.