Hello to every good man and woman :)

I upgraded ISA Server 2004 to ISA server 2006 SP1, after that my mail client stopped working. When I try to connect from outside it writes . Error Code: 403 Forbidden. ISA Server is configured to block HTTP requests that require authentication. (12250).

I found a solution: 

Solution 
In web listener click on the "Authentication" tab and then "Advanced..." and check the box "Allow client authentication over HTTP".

, but when I want to change setting in authentication settings, it says: Error 0x80070002, The system cannot find the file specified.

And I tried every solution with this error but no result :(

Hi,

Did you get a chance to check this?

http://forums.isaserver.org/m_2002027327/mpage_1/key_/tm.htm#2002080870

Rebuilding ISA Configuration Cache
http://blogs.technet.com/b/isablog/archive/2009/01/26/rebuilding-isa-configuration-cache.aspx

Hope that helps :)

Thank you for your reply :)

I've tried the first link already, but it didn't help. And the second one is only for enterprize, mine is standard... 

I've found solution!

Just deleted that web listener and created another one with same settings.