How to update web.config on each WFE in a SharePoint server farm?

Question

We have a SharePoint farm with multiple WFEs. A new application requires us to write some custom code to the web.config during deployment. What is the best wa

Answer 1

As part of your deployment, use the SPWebConfigModification class to add/remove entries from web.config. SharePoint will manage updating the WFEs for you if you use this.

A blog post entitled, Modify the web.config file in SharePoint using SPWebConfigModification, is a great summation of the gotchas involved and contains links to other helpful resources.