InfoPath Dev

the user click the form popup an InfoPath Editor Security Notice.

Microsoft Office has identified a potential security concern.

this form contains code which could be harmful to your computer.

the form is a domain trust without certificate.  any one knows how to solve this ?

thank you!

 Does your form have code? If it does, you might want to consider making the form full trust and signing it with a certificate.

 the security level I set domain trust. but not sure why some user can access the form without the popup security notice but some user will get that popup notice. we are all in same domain.

Is there anyone knows anything about this. Thank you!

 I would compare the Security settings in Internet Explorer, specifically, whether the site is added to the Local Intranet site on some machines (and not on others).

Thank you for your reply. 

the form is a filler form. will send through email and open from outlook. I checked their InfoPath filler settings. don't see any different. the form are not open through any other browser. I wonder is there any setting inside outlook will auto alert the warning notice.