Hubspot certificate not trusted

[sjames]

When installing the Outlook plugin I get this error:

Name: HubSpot Sales for Outlook
From: https://dl.getsidekick.com/outlook/vsto/Sidekick.vsto

************** Exception Text **************
System.Security.SecurityException: Customized functionality in this application will not work because the certificate used to sign the deployment manifest for HubSpot Sales for Outlook 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

[PamCotton]

Thank you for sharing your feedback @youp , and for sharing your solution @sjames !

Kindly,

Pam

[PamCotton]

Hello @sjames 

We have a great troubleshooting guide for the extension that will explain more about this error message.

• HubSpot Sales for Outlook install error: 'Customized functionality in this application will not work... 
• More information here also

I hope this information helps.

Pam

[sjames]

Thanks for that, but it certainly seems super "hack-y" as far as solutions go. Is there a reason Hubspot isn't using a trusted certificate?

[PamCotton]

Hello @sjames,

I confirmed with the team and our certificate is updated and valid.

We recommend working with your  IT team to see why there is a blocking in our plugin from installing.

Thank you,

Pam

[sjames · Accepted solution]

FYI for anyone having similar problems in the future, I was finally able to get it installed with this tool: 

https://www.smartlux.com/software/trust-prompt-tool/

The Internet Explorer advice above did not work in my case.

[DRochefort]

Thanks for the solution 👍

[catalystjeff]

Thank you sjames, this worked!!  I cant figure out why Hubspot doesnt have a fix for this yet.  

[youp]

Dear Hubspot, as much as your tutorials, help etc **bleep**, your clients rule, Thx sjames. That worked. 
after12 months of no desktop tool I got it working again.