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HT4977: iOS: Issues and resolutions with S/MIME and Exchange 2010

Learn about iOS: Issues and resolutions with S/MIME and Exchange 2010

HT4977 Signed and encrypted message replies and forwards sent by iOS 5 do not appear signed and encrypted

922 Views 4 Replies Latest reply: Jun 29, 2012 4:34 AM by James Ward4 RSS
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Jun 28, 2012 9:33 AM

Hello there,


I have a new iPad with iOS 5.1.1, The answer on this problem is update to iOS 5.1 or higher, however the problem is still here. When I send out digitally signed message from the default mail client of iPad to an Exchange 2010 recipient. The recipient side with Outlook 2010 doesn't recognize it as a signature, just the attachement appears as an unknown file (smime.p7s).


If I use my Outlook 2010 client to send out mail with the digital signature it is appearing properly (with the red ribbon) at the recipient Exchange 2010 mailbox. Do we have a real resolution or workaround for this?




iPad (3rd gen) Wi-Fi + Cellular, iOS 5.1.1


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