How to Enable Forms-Based Authentication When Using SSL Offloading


If you are using forms-based authentication with Secure Sockets Layer (SSL) offloading, you must configure your Exchange Server front-end servers to handle this scenario.

Before You Begin

This topic contains information about editing the registry.


Incorrectly editing the registry can cause serious problems that may require you to reinstall your operating system. Problems resulting from editing the registry incorrectly may not be able to be resolved. Before editing the registry, back up any valuable data.


To enable forms-based authentication when using SSL offloading

  1. Start Registry Editor.

  2. Locate the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeWeb\OWA

  3. On the Edit menu, point to New, and then click DWORD Value.

  4. In the details pane, name the new value SSLOffloaded.

  5. Click the SSLOffloaded DWORD value, and then click Modify.

  6. In Edit DWORD Value, under Base, click Decimal.

  7. In the Value Data box, enter the value 1.

  8. Click OK.


    You must restart the W3SVC service for these changes to take effect.

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