SecurityException Error

Error message: SecurityException: Customized functionality in this application will not work because the certificate used to sign the deployment manifest for Ahau.Office.Outlook.XXXXX or its location is not trusted. Contact your administrator.

Reason for error: After updates, the registry is changing for some reason, and to ensure correct work of the program the original settings need to be restored.

Text

************** Exception Text **************
System.Security.SecurityException: Customized functionality in this application will not work because the certificate used to sign the deployment manifest for Ahau.Office.Outlook.Addin.Redmine or its location is not trusted. Contact your administrator for further assistance.
   at Microsoft.VisualStudio.Tools.Applications.Deployment.ClickOnceAddInTrustEvaluator.VerifyTrustPromptKeyInternal(ClickOnceTrustPromptKeyValue promptKeyValue, DeploymentSignatureInformation signatureInformation, String productName, TrustStatus status)
   at Microsoft.VisualStudio.Tools.Applications.Deployment.ClickOnceAddInTrustEvaluator.VerifyTrustUsingPromptKey(Uri manifest, DeploymentSignatureInformation signatureInformation, String productName, TrustStatus status)
   at Microsoft.VisualStudio.Tools.Applications.Deployment.ClickOnceAddInDeploymentManager.ProcessSHA2Manifest(ActivationContext context, DeploymentSignatureInformation signatureInformation, PermissionSet permissionsRequested, Uri manifest, ManifestSignatureInformationCollection signatures, AddInInstallationStatus installState, TrustStatus sha256TrustStatus, X509Certificate2 sha256PublisherCert)
   at Microsoft.VisualStudio.Tools.Applications.Deployment.ClickOnceAddInDeploymentManager.VerifySecurity(ActivationContext context, Uri manifest, AddInInstallationStatus installState)
   at Microsoft.VisualStudio.Tools.Applications.Deployment.ClickOnceAddInDeploymentManager.InstallAddIn()
The Zone of the assembly that failed was:
MyComputer

Text

Customized functionality in this application will not work because the certificate used to sign the deployment manifest for Ahau.Office.Outlook.Addin.Redmine or its location is not trusted. Contact your administrator for further assistance.


************** Exception Text **************
System.Security.SecurityException: Customized functionality in this application will not work because the certificate used to sign the deployment manifest for Ahau.Office.Outlook.Addin.Redmine or its location is not trusted. Contact your administrator for further assistance.
   at Microsoft.VisualStudio.Tools.Applications.Deployment.ClickOnceAddInTrustEvaluator.VerifyTrustPromptKeyInternal(ClickOnceTrustPromptKeyValue promptKeyValue, DeploymentSignatureInformation signatureInformation, String productName, TrustStatus status)

Instructions:

Open the registry editor:
1. Click Start, and then click Run.
2. In the Open box, type regedt32.exe, and then click OK.
Find the following registry key:
\HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\.NETFramework\Security\TrustManager\PromptingLevel
If the key does not exist, create it.
Add the following subkeys as String Value, if they do not already exist, with the associated values.

Original settings should look like on the images below

If you have Administrator permissions, you can configure the ClickOnce trust prompt to control whether end users are given the option of installing Office solutions by saving a trust decision to the inclusion list. For information about inclusion lists, see Trust Office solutions by using inclusion lists.

For more information check this article: How to: Configure inclusion list security.