Update Rollup 19 for Microsoft Exchange Server 2007 Service Pack 3 (SP3) was released on March 15, 2016. Before you install this update rollup, see the Installation instructions.
Note This Update Rollup includes an updated Secure/Multipurpose Internet Mail Extensions (S/MIME) Control for Outlook Web Access. The control is signed to use a SHA-2 compliant code signing certificate. After you install this update, an updated version of the control on the Exchange server will be replaced. Users who have installed the earlier version of the control into a computer's browser must log on to Outlook Web Access and download the updated control after the Exchange server updates are completed.
Note This Update Rollup includes an updated Secure/Multipurpose Internet Mail Extensions (S/MIME) Control for Outlook Web Access. The control is signed to use a SHA-2 compliant code signing certificate. After you install this update, an updated version of the control on the Exchange server will be replaced. Users who have installed the earlier version of the control into a computer's browser must log on to Outlook Web Access and download the updated control after the Exchange server updates are completed.