Authorization popup when open tickets in IE

[lolik791]

I have OTRS in configuration
Server Win 2008 R2
• MySQL Server v 5.5 64-bit.
• Apache v 2.2 32-bit.
• Strawberry Perl 5.20.1.1 32-bit.
• OTRS 4.0.8.
I have two AD domains, SSO for customers from all domains and LDAP-authorization for agents from all domains.
When I use IE under customer or agent interface for open tickets, they opens? but I receive popup authorization, and if I cancel it I get error in ticket text field "Authorization Required
This server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials (e.g., bad password), or your browser doesn't understand how to supply the credentials required." In apache log I fix 401 code. When I use Mozilla Firefox I don't have such issue, but before login customer or agent I have authorization popup, and after authorization all ok.
I found topic with similar problem
viewtopic.php?t=27593
But I don't understand to where I must add this code?
"iframe {
position: relative;
}"

[crythias]

When using SSO the destination must be in the "local" Security settings or the browser will not pass current credentials.

[lolik791]

When using SSO the destination must be in the "local" Security settings or the browser will not pass current credentials.

I already have my server with OTRS in "Local Intranet" sites in IE. The difference between IE and Firefox in time when I have authorization popup - before the session in Firefox, and when I see tickets in IE.