4,381 questions
Outlook for Mac add-in, and for a particular user, we are getting prompts
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 55.00000000000001%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAS%3C/text%3E%3C/svg%3E)
Ankita Shrivastava
0
Reputation points
We have an Outlook for Mac add-in, and for a particular user, we are getting prompts that a secure connection cannot be established with the server and that the user needs to trust the certificate. If he trusts the certificate, the add-in will work, but we want to bypass that step and avoid any prompts, Do you have any idea why the prompt might be coming and how to prevent it?
Microsoft 365 and Office | Development | Other
Outlook | Windows | Classic Outlook for Windows | For business
9,714 questions
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(198.4, 10%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESM%3C/text%3E%3C/svg%3E)
SokiGuo-MSFT 31,536 Reputation points Microsoft External Staff2025-01-10T07:59:22.2+00:00 Welcome to our forum!
For better research, please provide more details about this case:
How is this add-in deployed?
Does the issue occur after the add-in is deployed?
Can other features of the Outlook client work properly?
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Ankita Shrivastava 0 Reputation points
2025-01-10T10:18:27.2066667+00:00 @SokiGuo-MSFT Add-in can be deployed via MDM or manually installed using a package file. This issue occurs in both scenarios. This issue occurs after the add-in is deployed. When the user opens the add-in task pane, outlook throws this certificate-related security warning and forces the user to add it to the keychain and trust it. This certificate which Outlook try to insert is the backend of the Outlook add-in. Outlook add-in backend runs on the same machine (desktop). Why does Outlook throw this certificate security warning message on that machine? The same software works on other customers and machines. we see this weird outlook behaviour only on this machine. How do I troubleshoot and fix this issue? Is this happening due to some browser security policy enforced in the organisation?
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Ankita Shrivastava 0 Reputation points
2025-01-10T11:00:40.95+00:00 @SokiGuo-MSFT Add-in can be deployed via MDM or manually installed using a package file. This issue occurs in both scenarios. This issue occurs after the add-in is deployed. When the user opens the add-in task pane, outlook throws this certificate-related security warning and forces the user to add it to the keychain and trust it. This certificate which Outlook try to insert is the backend of the Outlook add-in. Outlook add-in backend runs on the same machine (desktop). Why does Outlook throw this certificate security warning message on that machine? The same software works on other customers and machines. we see this weird outlook behaviour only on this machine. How do I troubleshoot and fix this issue? Is this happening due to some browser security policy enforced in the organisation?
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SokiGuo-MSFT 31,536 Reputation points Microsoft External Staff
2025-01-14T05:21:00.18+00:00 -
SokiGuo-MSFT 31,536 Reputation points Microsoft External Staff
2025-01-30T06:45:51.9866667+00:00 Is there any update on this case?
Please feel free to drop us a note if there is any update.
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