Hello,
I followed this documentation (I have 6.0.58 SP1) but I can not setup properly any custom error pages.
I added a 404.html page in the CMSMessages folder, and then added in the web.config (section system.web)
<customErrors defaultRedirect="~/CMSMessages/404.html" mode="On">
<error redirect="~/CMSMessages/404.html" statusCode="404" />
</customErrors>
I try to restart the website from IIS but when I type a not existing page url like http://dev-asia.tv5monde.com/Res.aspx, I still have the kentico error page instead of mine
Server Error
404 - File or directory not found.
The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.
Thank you for your advices !