Outlook Mobile – You can now use SMIME on Outlook Mobile

After being able to add a shared mailbox on Outlook mobile (see https://t.co/MkG56cl1TT), another long awaited feature is now available on your Outlook mobile application: the use of SMIME.

To start using, you need of course an SMIME certificate – I will not go in details there on how or where to get SMIME certificates, reach out either to your IT support or on the Internet Smile.

NOTE support for S/MIME certificate issuing and delivery using application configuration for enrolled devices will come in the future.

Then reach out to your mobile and open the Outlook mobile app to go to the Settings and access the email account you want to enable for SMIME – if you have multiple accounts, you will have to do it for each of them


Then click on Security


And turn on S/MIME; the application will have to restart after turning S/MIME on

NOTE turning on S/MIME will disable the thread view (aka Organize by thread) if you have it enabled

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Then next time you write an email and want to sign and/or encrypt it with S/MIME just use the “more” menu (Android device) to choose the S/MIME option

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Off course, if you don’t have an S/MIME certificate installed, you will not be able to do anything other than just viewing S/MIME message (being shown as ‘attachment like)

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Benoit Hamet
Benoit Hamet
Benoit is working on Microsoft collaborative technologies He has been awarded as MVP for more than 12 years Currently MVP on Office 365 after being awarded on SharePoint (2011-2012) and Windows client & server (2002-2007) Speaker at various Microsoft events (TechDays, TechNet seminars) and Quest Software He works on on-premises (Active Directory, RADIUS/NPS, Exchange, Skype for Business, SharePoint, SQL, Terminal Server, Windows client and Windows Server) or online (Azure, Intune, Office 365, Exchange Online, SharePoint Online, Skype for Business Online, Teams) technologies