VB.NET - Outlook - Web images in signature

Hello,
I'm developping an App in VB.NEt that generate à signature in Outlook based on Active Directory information.

I need to include images in this signature. The images are hosted on the website of my customer, because he wants that the marketing people could change the banner.

But on the first launch after I generate the signature, Outlook ask the user
"Some of the files in this Web page aren't in the expected location. Do you want to download them anyway? If you're sure the Web page is from a trusted source, click Yes"

How can I remove this question from the system, or change the security to put this website like a trusted source ?

Thanks.
arobreizhAsked:
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BuggyCoderCommented:
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arobreizhAuthor Commented:
Thanks, but I has already seen this.

It's an old support about Office 2000.

My customer is on Office 2003.
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arobreizhAuthor Commented:
Best one
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