This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](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(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Hello.
I get the following error sending email from Outlook (the Microsoft 365 office desktop application).
If I click on Yes, the mail is sent OK. I have gone through View Certificate and Install Certificate but I continue to get the error.
What should I do?
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
Hi. I'm Brian and I'll try to help.
What type of account (POP, IMAP, Exchange) are you using? Who is your mail provider - that is, what follows the @ in your address? Click the "View Ceritificate" button and copy the result as a reply to this thread.