Here is an example of how to modify global.asax.cs to achieve this, however it only works for version 3.x, since the source code for global.asax.cs is different in version 4.1: http://devnet.kentico.com/Forums. aspx? ForumID = 19 & Thread = 00004982
So I need a solution for 4.1.
Thank!
In 4.1, you can run this SQL script to update urls
update CMS_DocumentAlias โโset AliasURLPath = LOWER (AliasURLPath)