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Customized functionality in this application will not work because the certificate used to sign the deployment manifest for OutlookAddin is not trusted. Contact your administrator for further assistance. RRS feed

  • Question

  • Hi, I am getting this message when I am trying to install the outlook plugin developed.

    Customized functionality in this application will not work because the certificate used to sign the deployment manifest
    for OutlookAddin is not trusted. Contact your administrator for further assistance.

    I have copied all the files to,local drive infact inside my documents folder,  but the error continues.

    Wednesday, August 12, 2015 10:11 AM

Answers

  • Hello Swanand,

    Internet Explorer Enhanced Security Configuration (IEESC) in Windows Server 2003 and higher, and Internet Explorer 7 and higher, significantly restricts the ability of users to browse the Internet. When users try to install Office solutions from a network file share or web location, they might get the following error message: "Customized functionality in this application will not work because the certificate used to sign the deployment manifest for SolutionName is not trusted. Contact your administrator for further assistance."

    With IEESC and Internet Explorer 7 and higher, if the URL of the deployment manifest is categorized in the Internet zone, the manifest must have a certificate from a trusted publisher or the solution cannot be installed. Without IEESC, the default behavior is to prompt the end user to make a trust decision.

    To manage the effect of IEESC and Internet Explorer 7 and higher, identify web sites and universal naming convention (UNC) paths that you trust and add them to one of the trusted security zones (Local intranet or Trusted sites).For information about how to manage zones, see Configuring ClickOnce Trusted Publishers.

    You can read more about that in the Troubleshooting Office Solution Security article.

    Wednesday, August 12, 2015 2:38 PM