Office 365 - Support for UW-Madison's Digital ID Service

What is a UW Digital ID?

What is S/MIME?

S/MIME stands for Secure/Multipurpose Internet Mail Extensions and is a standard for public key encryption and signing of MIME data (more details).


Q. Does Office 365 using a desktop client (Outlook) support S/MIME email signing and encryption with UW System's Public Key Infrastructure (UW Digital ID)?

A. Yes. Email signing and encryption with Office 365 has been evaluated by the UW Digital ID Team. S/MIME signing and encryption will continue to function in the same way it does currently for desktop clients such as Outlook and others. These clients will manage UW Digital ID (X.509 certificates) in the same manner they do today.

What does this mean?

  • You can read, reply, or forward digitally signed email.
  • You can create digitally signed email.
  • You can read and create S/MIME encrypted email.

Q. Does the Office 365 web interface (Outlook on the web) support S/MIME email signatures with UW System's Public Key Infrastructure (UW Digital ID)?

A. No, Office 365 Outlook on the web does not support this capability.

What does this mean?

  • You can read, reply, or forward digitally signed email (if you click the blue "click here" link or open (double-click) the message).
  • You cannot create digitally signed email.
  • You cannot read or create S/MIME encrypted email.
  • Note: If you need to use S/MIME email signing or encryption, we recommend you use a desktop email application such as Outlook.


Note: View Microsoft documentation for further details.

See Also:




Keywords:microsoft office o365 outlook 2013 2010 2011 web app support s/mime mime smime email encryption uw-madison public key infrastructure digital id web interface pki signatures signing signed messages emails digitalid encrypting encrypted   Doc ID:32952
Owner:Ara M.Group:Office 365
Created:2013-08-22 13:52 CDTUpdated:2016-06-14 08:22 CDT
Sites:Digital ID, DoIT Help Desk, DoIT Tech Store, Office 365
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