Update Rollup 17 for Exchange Server 2010 Service Pack 3

To get this update, follow these steps:

1. Open Windows Update.
2. In the navigation pane, select Check for updates, and then wait while Windows looks for the latest updates for your computer.
3. If you see a message that states that optional updates are available or asks you to review optional updates, select the message to view the updates.
4. In the list, select the check box for update 4011326, and then select Install.

When you install this update rollup on a computer that isn't connected to the Internet, you may experience a long installation time. Additionally, you may receive the following message:

This behavior is caused by network requests to connect to the following website:

http://crl.microsoft.com/pki/crl/products/CodeSigPCA.crl

These network requests represent attempts to access the certificate revocation list for each assembly that native image generation (NGen) compiles to native code. However, because the server that's running Exchange Server isn't connected to the Internet, each request must wait to time out before the process continues.

To fix this issue, follow these steps:

Important Before you apply this update rollup, make a backup copy of any customized Outlook Web App files.

When you apply an update rollup package, the update process updates the Outlook Web App files, if it's required. Therefore, any customizations to the Logon.aspx file or to other Outlook Web App files are overwritten, and you must re-create the Outlook Web App customizations in Logon.aspx.