Dear All,
I've Exchange 2013 on Windows 2012 server and external internet users have been reporting that attachments they receive from internal users are showing only as winmail.dat .
When I use this command "Set-RemoteDomain -Identity * -TNEFEnabled $false" , it solved my issue with the winmail.dat sending with attachments and PDF files etc delivered.
However, once this was enabled we were having delivery failure notifications and having large number of emails (going to external users) that would get stuck in the submission queue. I had to enter following command "Set-RemoteDomain -Identity * -TNEFEnabled $true" to solve the problem and winmail.dat issue came back and attachments were not delivered.
When users report attachment winmail.dat issue, I have to create new remote domain and specify -TNEFEnabled $false everytime like below for the failed domains (They are usually non Microsoft clients, I think).
New-RemoteDomain -Name xxxx -DomainName xxxx.com
Set-RemoteDomain -Identity xxxx -TNEFEnabled $False
Setting client`s Outlook mail format to Plain Text or HTML doesn`t help.
I don`t mind create every time but users have to experience this issue and then I can add remote domain and solve the issue but it is creating inconvenience. Do you have any permanent solution for this problem?
Kind regards,
Itech