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What happens if you user username@domain?
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What happens if you user username@domain?

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What version of IIS are you using?
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I'm using IIS 7. &nbsp;If I use username@domain it will not authenticate.
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I'm using IIS 7.  If I use username@domain it will not authenticate.

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I have an FTP setup on IIS and I can access it by typing in domain\username, but when I try to authenticate using username@domain.local it fails. &nbsp;Any idea why?
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I have an FTP setup on IIS and I can access it by typing in domain\username, but when I try to authenticate using username@domain.local it fails.  Any idea why?

IIS FTP authenticates with domain\username but not username@domain.local

File sharing is the practice of distributing or providing access to digital media, such as computer programs, multimedia (audio, images and video), documents or electronic books. Common methods of storage, transmission and dispersion include manual sharing utilizing removable media, centralized servers on computer networks, World Wide Web-based hyperlinked documents, distributed peer-to-peer networking (P2P) and cloud-based file syncing.

File Sharing Software

IIS is Internet Information Services, the web server included with Windows Server operating systems. All current versions are built on a modular architecture; modules can be added or removed individually so that those required for specific functionality are installed. The full installation of IIS includes HTTP, security, content, compression, caching, logging and diagnostics.

Microsoft IIS Web Server

A server is a computer program or a machine that waits for requests from other machines or software (clients) and responds to them. This architecture is called the client–server model. The clients may run on the same computer or may connect to the server over a network. The purpose of a server is to share data or hardware and software resources among clients. Typical computing servers are database servers, file servers, mail servers, print servers, web servers, game servers, and application servers.