Outlook 2010 (outbound) switches a PDF attachment to a Win.dat attachment

THe title pretty much describes the issue. Any ideas?
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LockDown32OwnerAsked:
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Joe Winograd, Fellow&MVEConnect With a Mentor DeveloperCommented:
You probably mean winmail.dat (not win.dat). This is a common, and very nasty, problem that doesn't have a single answer — sometimes one fix works, sometimes a different one. I've participated in many questions here at EE on this same problem. Here are several of them:

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_28616021.html

http://www.experts-exchange.com/Software/Office_Productivity/Groupware/Outlook/Q_28129365.html

http://www.experts-exchange.com/Software/Misc/Q_28199110.html

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_28605102.html

http://www.experts-exchange.com/Software/Office_Productivity/Groupware/Outlook/Q_28512378.html

https://www.experts-exchange.com/questions/28616021/People-receiving-PDF-attachement-as-winmail-dat-files.html

I hope an answer in one of these works for you, but since there is no single answer, you'll have to experiment. Btw, a search on EE for winmail.dat gets 926 hits! Regards, Joe
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☁ François Peroux ☁Connect With a Mentor Infrastructure ConsultantCommented:
Hello,

This KB from Microsoft should do the job :

https://support.microsoft.com/en-ca/kb/138053

Let me know !
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Joe Winograd, Fellow&MVEDeveloperCommented:
Re the previous post, it is one of many possible solutions, but keep in mind that it is impossible to say with certainty that any single fix should do the job. In fact, do a search for "winmail.dat" at the link in the previous post and you'll get pages upon pages of hits with many other ideas for fixing the problem. Regards, Joe
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☁ François Peroux ☁Infrastructure ConsultantCommented:
@Joe, sure, winmail.dat could be also caused by the recipient and not from the sender side.

There is many solution and way to try though.

Let us know !
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