---
title: Why to choose Single Sign-On (SSO)?
description: To use SSO, individual users must already exist in the COS system. New users require setup by COS before gaining access through SSO.
---
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1. [Frequently Asked Questions](https://help.cos.net.au/knowledge?hsLang=en)
2. [COSnet](https://help.cos.net.au/knowledge/cosnet?hsLang=en)
# Why to choose Single Sign-On (SSO)?
**1. User Existence in COS System:**
- To use SSO, individual users must already exist in the COS system.
- New users require setup by COS before gaining access through SSO.
**2. SSO Directory Requirement:**
- On the customer side, users must also exist in the designated SSO directory to ensure successful authentication.
**3. One-Step Click:**
- Enjoy seamless access to COSnet for enhanced efficiency and user satisfaction.
**4. Disabling Username and Password Login:**
- If exclusive SSO usage is mandated, COS can disable login via username and password.
- Please contact your COS Account Manager via email to enable this feature.
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