Last September, we announced new capabilities in Office 365 Message Encryption that enable users to seamlessly collaborate on protected emails with anyone. This release included Do Not Forward an out...
Updated May 11, 2021
Version 11.0
Blog Post
Mark Galvin, sorry to hear that didn't help. I should have also clarified that my environment is 95% Windows 7 and we have a mix of Office builds 9330 up to 10228. On the one machine for which the steps above did not work I took a shotgun approach so I don't know which may have actually resolved the issue (high stress users, never easy to take a scientific approach to problem resolution). In that separate case I performed the following:
- Deleted everything in Credential Manager related to Office
- Applied the regfix/workaround from here https://support.microsoft.com/en-my/help/4025962/can-t-sign-in-after-update-to-office-2016-build-16-0-7967-on-windows-1
- Rebooted
- Signed them out of Office 365 via Word and back in again
- Opened Outlook, success
On a related note, I just tried clearing everything from Credential Manager on a machine exhibiting the error without performing the sign out/in procedure without success (no reboot though...shouldn't be necessary?) After performing the Office 365 account sign out/in process (no reboot) the encrypted messages opened as advertised.