One of the email inboxes I use gets emails from Spam notification email@example.com and when I click on “Release to Inbox” or “Report as Not Junk” to let an inadvertently temporarily blocked spam-quarantined message through, I get a little popup error message on the Mac Safari browser:
Finally found a solution at the Microsoft support site: Mac users can’t release messages from Exchange Online Protection quarantine—
To resolve this issue, follow these steps:
- Locate the Keychain Access program on the Mac. To do this, open Finder, and then open the Applications folder. The Applications folder contains a folder that’s named Utilities. The Keychain Access program is in the Utilities folder.
- Open Keychain Access, and then locate all certificates in the Safari dialog box that show as This client requires a certificate.
- Select the certificates that you located in step 2, and then delete them from Keychain Access.
- Restart Safari.