How to Enable or Disable S/MIME in Outlook Web Access

Microsoft Exchange Server 2007 will reach end of support on April 11, 2017. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.


Applies to: Exchange Server 2007 SP1, Exchange Server 2007 SP2, Exchange Server 2007 SP3

Topic Last Modified: 2007-08-17

This topic explains how to use the Exchange Management Console and the Exchange Management Shell to enable or disable use of S/MIME in Microsoft Office Outlook Web Access. By default, S/MIME is enabled on the /owa virtual directory.

To perform this procedure, the account you use must be delegated the Exchange Server Administrator role and membership in the local Administrators group for the target server.

For more information about permissions, delegating roles, and the rights that are required to administer Microsoft Exchange Server 2007, see Permission Considerations.

  1. In the Exchange Management Console, click Server Configuration, and then click Client Access.

  2. In the work pane, select owa (Default Web Site), and then, in the action pane, click Properties.

  3. On the owa (Default Web Site) Properties page, click the Segmentation tab.

  4. In the Segmentation window, find the S/MIME feature.

  5. To enable or disable S/MIME, select S/MIME, and then click Enable or Disable.

  6. Click OK to save your change, and then close the properties window.

  • Run the following command to disable S/MIME on the Outlook Web Access virtual directory named /owa in the default Internet Information Services (IIS) Web site on the local server:

    Set-OWAVirtualDirectory -identity "owa (Default Web Site)" -SMimeEnabled $false
  • To enable S/MIME, use:

    Set-OWAVirtualDirectory -identity "owa (Default Web Site)" -SMimeEnabled $true

For information about syntax and parameters, see Set-OwaVirtualDirectory.

Availability of S/MIME in Outlook Web Access can be controlled on a per-user basis by using the Set-CASMailbox cmdlet and the OWASMimeEnabled parameter.

For more information about S/MIME in Outlook Web Access, see Outlook Web Access and S/MIME.