SMIME Extension Error in EDGE

Ahmed Sh 80 Reputation points
2024-06-19T12:06:55.9766667+00:00

I am getting an error while trying to test Out SMIME Extension in OWA (Outlook on the web)

 

-S/mime works fine in Outlook Desktop Client, Issue is only for OWA

 -I have installed the extension using the link:

Microsoft S/MIME - Microsoft Edge Addons

 

 

-Attempting to access S/mime page in OWA settings before installation(or while extension disabled) shows the attached:

-Link: https://outlook.office.com/mail/options/mail/smime

 

-After Installation(enabling), It just keeps loading forever, Never stops or returns the error

 

Accessing the Extension page: edge://extensions -> Select Extension -> Select "errors" shows the below:

 

Error while receiving settings: [object Object]

"Unchecked runtime.lastError: Access to the specified native messaging host is forbidden."

 

Any idea? What could be going wrong here? (Keep in mind, S/mime works fine in Outlook Desktop Client)

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Answer accepted by question author
Mike Hu-MSFT 4,085 Reputation points Microsoft External Staff
2024-06-21T09:30:10.1333333+00:00

Great to know that the issue has already been resolved and thanks for sharing the solution so that others experiencing the same thing can easily reference this! Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others", I'll repost your solution in case you'd like to "Accept" the answer : )     

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Issue Symptom: 

Getting an error while trying to test Out SMIME Extension in OWA (Outlook on the web)

-S/mime works fine in Outlook Desktop Client, Issue is only for OWA

 -After Installation(enabling), It just keeps loading forever, Never stops or returns the error

Accessing the Extension page: edge://extensions -> Select Extension -> Select "errors" shows the below:

Error while receiving settings: [object Object]

"Unchecked runtime.lastError: Access to the specified native messaging host is forbidden."

Resolution: 

-Seems to be working now in OWA in Edge after I used Set-SmimeConfig to enable the OWAIncludeSMIMECapabilitiesInMessage parameter.

-Also an important tip is that it does not work with unified labelling, Unless the Label's advanced settings have S-mime enabled.

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  1. Mike Hu-MSFT 4,085 Reputation points Microsoft External Staff
    2024-06-20T06:13:06.71+00:00

    Hi,

    Thanks for posting your question in Microsoft Q&A Community.

    What OS is your device using? S/MIME isn't available in Outlook on the web on Mac, iOS, Android, or other non-Windows devices.

    And I want to confirm with you if any other devices have this problem?

    This document may be helpful, just check your steps: Encrypt messages by using S/MIME in Outlook on the web - Microsoft Support

    Please feel free to contact me for any updates.

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