And we need to manually add the web forms file and configure the toolbox. As I understand, it looks like this is designed. S/MIME has long been the bastard stepchild of e-mail encryption, largely because it’s more complex to set up and keep up. However, Apple’s Mail programs on Mac OS and iOS both support it, as does Microsoft Outlook on Windows. There are plenty of S/MIME compatible mail programs. Setting up S/MIME for your Apple products isn’t that hard. Hello, I'm in the process of migrating my Ex2003 environment to Ex2010. When using OWA with a mailbox on the Ex2010 mailbox server, the body of S/MIME signed mails is not visible. I can see the sender and the subject but the text field just tells me 'This message has a digital signature. The digital signature couldn't be validated because the S/MIME control isn't available.' But nothing else. After installing the control, the mail is properly displayed when using IE but clients who don't have IE are out of luck. ![]() In my test environment, the above message is also displayed but at least I can read S/MIME signed mails using FF etc. I can't fiigure out what the difference between test and production is. I have quite a flat environment (1 Ex2003 front-end, 1 Ex2003 back-end, 1 Ex2010 CAS and 1 Ex2010 mailbox server) and followed the Exchange 2010 deployment wizard. Any hint would be greatly appreciated. Hi: >>After installing the control, the mail is properly displayed when using IE but clients who don't have IE are out of luck. Which brower does your client use (firefox,your system is MAC)? Why don’t your clients download and install IE 7/8? Do your clients log in owa light mode? It is not supported. >>In my test environment, the above message is also displayed but at least I can read S/MIME signed mails using FF etc If IE/FF works well, configuration of owa is correct. Users must have a digital ID and must install the S/MIME control for Outlook Web App before they can send encrypted and digitally-signed messages using Outlook Web App. They must also have a digital ID and the S/MIME control to read encrypted messages in Outlook Web App. The S/MIME control is necessary to verify the signature on a digitally-signed message. You should make sure your user install S/MIME control and certificate on their workstation. You should update version of brower and restore it to default setting. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Hello, thanks for the response. We are a mixed environment (Windows, Linux, Solaris, Mac), so I have to have OWA run wit non-IE browsers. Users do not use light mode. Users just want to be able to simply READ digitally signed messages, so they don't need their own digital ID, and they don't need the S/MIME control. How to change home screen in google chrome for mac. In my test environment, it works as it should. In production, it doesn't. Users see the sender and the subject but not the body of the mail. So far, I haven't found any browser which could display the entire mail (including IE without the control), so this appears to be a server issue. What could be problem? Hi Requirements to Support S/MIME in Outlook Web App S/MIME requires that users sign in to Outlook Web App using Microsoft Internet Explorer 7 or Internet Explorer 8. In addition to requiring Internet Explorer 7 or Internet Explorer 8, S/MIME also requires that Secure Sockets Layer (SSL) be used by the /owa virtual directory. S/MIME is not supported in Outlook Web App Light. Using S/MIME in Outlook Web App Users must have a digital ID and must install the S/MIME control for Outlook Web App before they can send encrypted and digitally-signed messages using Outlook Web App. They must also have a digital ID and the S/MIME control to read encrypted messages in Outlook Web App. The S/MIME control is necessary to verify the signature on a digitally-signed message. The S/MIME control for Outlook Web App is installed on a user’s computer by using the SMIME tab in Options. After the user has received a digital ID and the S/MIME control has been installed on their computer, they can use S/MIME to help secure e-mail mail messages. You can read this article. Can you try to install S/MIME control and digital for one windows client in your production environment? Maybe the result can narrow down the issue. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Hi, I think I understand the requirements to use the full functionality of S/MIME. My only requirement is that users be able to read digitally signed messages using non-IE browsers.
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