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Using Browser Cache Management
Use Browser Cache Management to improve client side performance and security of IBM® Lotus® Domino™ Web Access sessions on Microsoft® Internet Explorer by controlling which entries are stored in the cache and which are removed when the Domino Web Access session ends. Many organizations restrict files that are left in the browser cache for security reasons but for lower end machines, loading the Domino Web Access for each session may adversely impact performance. So, for example, you may want to leave Domino Web Access design elements in the cache for performance reasons, but remove everything retrieved from mail files for security reasons.

You can set the cache scrubbing level to remove all cache entries or only those related to the user’s mail file. Browser Cache Management improves client side performance, for example, by archiving static design elements of Domino Web Access locally, and then restoring them to the cache the next time the browser is accessed. This is particularly useful when Domino Web Access is accessed via a lower bandwidth connection.

Setting up Browser Cache Management

You set up Browser Cache Management in the Domino Web Access server’s Configuration Settings document. Once you have enabled this feature, you can choose whether to install it on Domino Web Access clients automatically, or to give users the option of installing it. If you install it automatically, the first time a user accesses Domino Web Access, a Browser Cache Management system confirmation displays, prompting the user to close all browser windows for Browser Cache Management to take effect.

If you enable Browser Cache Management but do not install it automatically, users can install (and uninstall) it using a Domino Web Access preference (Preferences - Logout). If you have not enabled Browser Cache Management, this preference is not visible. As an additional security measure, you can prevent users who have not installed Browser Cache Management from adding or accessing e-mail attachments.

Once the Browser Cache Management feature has been installed on a user’s system, the cache cleanup occurs based on the cache scrubbing level set in the server’s Configuration Settings document. The user cannot change this. However, if it has not been installed, users can manually clear the cache at logout by clearing the history, and selecting one of these logout options:


For information a full description of the Browser Cache Management settings in the Configuration Settings document, see the Browser Cache Management section in Editing the Configuration Settings document for Domino Web Access.

Caching STLinks files

By default, Domino Web Access forces caching of STLinks files. To override this, use the NOTES.INI setting iNotes_WA_DisableExpiresForSTLinks=1.

Note A current listing of Domino Web Access NOTES.INI settings can be found on the Lotus developerWorks Web site at http://www-128.ibm.com/developerworks/lotus/documentation/notes-ini/.

See also