Greetings all,
I've got a new Exchange 2013 setup and external internet users have been reporting that attachments they receive from internal users are showing only as winmail.dat (why does this problem still exist?!?)
In Exchange 2010 I had a transport rule that sent *everything* to the internet as plain-text to stop this happening, but I can't seem to find any info on how to do this in Exchange 2013. There's no obvious options in the ECP, so I'm guessing it's a powershell command?