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title: What is IdentityServer?
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## What is IdentityServer?

IdentityServer is a .NET framework which allows you to develop an identity solution, using the OpenID connect protocol, an extension to OAuth 2.0.

Using this library you can provide a single sign on solution, a process which centralizes the authentication of your users into one location, allowing you to provide a secure and robust solution to user identity and authentication.

## How does AdminUI fit in?

AdminUI provides a web portal for you to administer your IdentityServer solution. 

Using AdminUI you can perform configuration of users and clients.  AdminUI will also guide you through the configuration of your identity solution, making it easier and quicker than developing code.

This is only a brief overview of IdentityServer and AdminUI you may want to look at the following links for more details;

[Introduction to IdentityServer](https://identityserver4.readthedocs.io/en/latest/intro/big_picture.html#) 

[More information about AdminUI](https://www.identityserver.com/products/adminui)

If you are looking for remote development support, production support, consultancy or guidance with IdentityServer, don’t hesitate to contact [sales@identityserver.com](mailto:sales@identityserver.com) for a free quote.