Along with hundreds of thousands of people; I’ve just updated windows to Windows 10. Almost everything has worked flawlessly except Outlook twinned with e-mail signing. Now when I try and send email from Outlook 2013 I’m greeted with the following error:
“Microsoft Outlook” “A required action was not successful because of an unspecified error.” Un-ticking the option to sign the e-mail then allows it to send. The most information I can find is something to do with Outlook’s access to Windows Crypto API.
To be even more weird I’ve actually managed to send a signed message once.. then it broke again a few minutes later when I went to reply to another message.
I’ve reproduced this problem on a brand new Windows 10 installation with Office 2013 and verified that the problem doesn’t exist on a brand new install of Windows 8.1 with Office 2013. All tests were performed using the same certificate.
I’ve reported the problem to Microsoft and have been assigned the reference 1298080798. Supposedly someone will contact me for further diagnostics within the next day. UPDATE: I never heard anything more from Microsoft! Pretty poor performance there.
FIX IS HERE!
Thank you to visitor “John” who found the solution on the Microsoft forums.. Simply run sfc /scannow. No reboot required either.
Here is what I tested and found solved the issue:
1) Close Outlook
2) Click start, type in cmd. Right click on CMD and run it as Administrator.
3) Type in sfc /scannow and press enter
C:\WINDOWS\system32>sfc /scannow Beginning system scan. This process will take some time. Beginning verification phase of system scan. Verification 100% complete. Windows Resource Protection found corrupt files and successfully repaired them. Details are included in the CBS.Log windir\Logs\CBS\CBS.log. For example C:\Windows\Logs\CBS\CBS.log. Note that logging is currently not supported in offline servicing scenarios. C:\WINDOWS\system32>
4) Once it finishes.. close command prompt.
5) Try Outlook again!
However as the problem crops up on a brand new Windows 10 install without a prior Windows 7 or 8 upgrade this means the Office installer is somehow breaking windows, or windows is broken out of the box until you run an sfc.