The post topic says it all. Occurrences of winmail.dat attachments are increasing and my sense is that it is proportional to the increase in the use of Office 365. My recent research leads me to believe that it is much harder for senders to fix than when it could be fixed at Exchange. I know of utilities that will decode winmail.dat but there is a serious need to keep these attachments readily available from the email.
I envision capturing these messages before they arrive in user mailboxes, decoding winmail.dat, and then forwarding the message to the appropriate user with the decoded files attached. Unfortunately it's only a vision. I don't know how it could be implemented. I would appreciate your comments on how you are handling this.
TIA