Add FAQ entry to solve issue with IE and IIS

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Frederic Guillot 2016-12-02 18:12:57 -05:00
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- [Solving database migration issues](solving-database-migration-issues.markdown)
- [Blank page after upgrading](solving-blank-page-issue.markdown)
- [Unable to open a session on Windows IIS and Internet Explorer](solving-session-issue-windows-iis-ie.markdown)
- [Performances](performances.markdown)
Technical details

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I'm not able to login with Internet Explorer and Microsoft IIS
==============================================================
If you are not able to login and always get the error **"Username or password required"** even if you have entered the right credentials,
that means there is a problem with the session.
For example, this is a known issue if you meet these criteria:
- You are using a domain name with an underscore: `kanboard_something.mycompany.tld`
- You are using Microsoft Windows Server and IIS
- Your browser is Internet Explorer
Solution: **Do not use underscore in the domain name because this is not a valid domain name**.
Explanation: Internet Explorer doesn't accept cookies with a domain name with underscores because it's not valid.
Reference:
- https://support.microsoft.com/en-us/kb/316112