disable Outlook alert, program is trying to send mail on your behalf

Hi. Have a customer with Office 2013, set up with Office365 Exchange online.
A 3. party software is sending out pay-checks to 100 employees through Outlook.
Get a warning on each and every mail saying that a program is trying to send mail on your behalf (loosly transelated from norwegian..)
Have under  trust center set "never warn me about suspicios activity" on this users terminal sever profile but no help there.
Any other tips?
Tore JacobsenSystem adminstratorAsked:
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I've seen that also and haven't found a "real" fix aside from a 3rd party supression tool.

I have had good luck with this one:


However, you have to pay $40 for the version that supports 2013.  But there is a trial that you can run to see whether it fixes it...

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Tore JacobsenSystem adminstratorAuthor Commented:
Was hoping for a ms fix.
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