Outlook using ACT database for addresses and winmail.dat files.

My client uses Outlook in conjunction with the ACT! contact list and history for each of their contacts.  She has a specific few that continue to receive attachments as winmail.dat files.  We have disabled RTF on the Exchange server and inside of her Outlook.  When she types the addresses in directly into the 'to' box the recipients get the attachment just fine.  When she chooses the contacts out of the ACT! contact list by clicking the 'to:' box to bring up the list, these contacts receive the winmail.dat files.  I was unable to find a way to edit these particular contacts as they are not an Outlook contact list, they are the ACT! Contact list.  Microsoft support blames ACT!.  ACT! says its has to do with Outlook.  My client is frustrated that neither of them can come to a conclusion and here I am.  What are my options and how should I proceed?
xponetAsked:
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xponetAuthor Commented:
FYI its Outlook 2010 and ACT! 2013
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Mike LazarusAct! Evangelist - CRM ConsultantCommented:
Have you checked both of these in Outlook (I'm using Outlook 2013, so should be similar):

File | Options - Mail

1. Compose Messages
"Compose messages in this format" set to "Plain Text" or "HTML"

2. Message Format
"When sending Rich Text messages to Internet ..." set to "Convert to HTML format" or "Convert to Plain Text format".

There is also I setting in Exchange I found a while back ... if you have these settings correct and it still fails, what version of Exchange?
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xponetAuthor Commented:
After speaking with ACT! Support they claim that it is working correctly and that there is no way a specific contact would be any different than any other contact.  I have tested this to my email and it is working correctly.  However this issue is not a persistent one.  It only happens occasionally to specific contacts.  @GLComputing I have checked and verified the above settings and they are all correctly configured to convert to html.  I have sent some test messages to 2 recipients of the winmail.dat file attempting to recreate the issue.  Hopefully I will know more after I get some responses.

The ACT! support guy removed and reconnected the address book that Outlook uses to access the ACT! Database of emails.  Hopefully this will make some progress on this issue.  

Unfortunately for me this issue remains open.
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Mike LazarusAct! Evangelist - CRM ConsultantCommented:
It's not the specific contact, it will be fine if the other contact has Outlook ... the problem should only be if that aren't using Outlook.

You might want to confirm that
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xponetAuthor Commented:
@GLComputing I will verify that the recipients are using Outlook as their email clients and update this thread.
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xponetAuthor Commented:
Unfortunately I do not have a way to verify that the recipients are using Outlook as their mail clients.  However this confuses me, if someone sends email to my gmail account from an Outlook client then there is a possibility that any attachments they send me could possibly be affected like this.  This sounds like a very severe problem with Outlook.  Am I wrong?
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Mike LazarusAct! Evangelist - CRM ConsultantCommented:
I had this issue with Outlook/Exchange about three years ago ... just can't recall how I fixed it at the moment

I think it ended up being an Exchange setting.
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xponetAuthor Commented:
That funny because their mail is hosted with AppRiver hosted Exchange.
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Mike LazarusAct! Evangelist - CRM ConsultantCommented:
It was the sending Exchange server (mine at the time) that caused this ... maybe if I get some time later in the day, I'll see if I can find some records - but it was about 8 years ago :-(
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xponetAuthor Commented:
Unfortunatly I was unable to come to a solid answer for this issue.  I am stuck in the middle of a triangle of finger pointing between MS, Sage, and our hosted Exchange provider so...  Also the client no longer wants to waste money to resolve it.  I would like to close this question just refund my points... :(
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Mike LazarusAct! Evangelist - CRM ConsultantCommented:
I was just solving this for another user ... and came across this again.

Articles I used to fix it:

Overview and Outlook settings:
http://support.microsoft.com/kb/290809
http://support.microsoft.com/kb/278061/en-us
http://support.microsoft.com/kb/958012

Exchange settings from
http://support.microsoft.com/kb/257800
http://support.microsoft.com/kb/149203/EN-US
http://support.microsoft.com/kb/138053/en-us

For Hosted Office 365:
http://support.microsoft.com/kb/2487954/en-us

This also has a good description of the issue and details on the fixes:
http://www.slipstick.com/problems/outlook-is-sending-winmail-dat-attachments/

Also, depending on the versions of Outlook and Exchange, there have beenn patches for this issue, as well as one for Forefront Security
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xponetAuthor Commented:
I wanted this question closed.  Since I was never able to come to a resolution with this and another application has since taken its place, even finding an answer is not worth the points.
Sorry that it took me so long as I thought the question was closed.  Thanks.
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