Hello TechNet,
I have an on going situation with winmail.dat attachments. I currently have a ticket open with Microsoft, but I want to see if anyone has personal experience with this. Here is the rundown.
We have migrated from an Exchange 2007 server to Exchange 2013 for the migration to Office 365. We also have a hosted Office 365 server with half of our mailboxes in the cloud and half of them on the Exchange 2013 on premise server.
The current settings for TNEFEnabled:
On Premise: False
Hosted: False
Whenever a internal email with a calendar invite(exchange calendar, go to meeting) goes out to any external domain the recipients receive winmail.dat.
When settings for TNEFEnabled On Premise and Hosted are set to true both calendar invites and PDF, Excel attachments etc the recipients receive winmail.dat.
When speaking with Microsoft about this issue. The representative was watching me through a LogMeIn session as I set both TNEFEnabled false on both on Premise and Hosted.
This is really frustrating as many employees depend on this to be fully functional, and to be honest am tired of dealing with this.
I need help.
-Ben