> ## Documentation Index
> Fetch the complete documentation index at: https://docs.versori.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Single Sign-On

Single sign-on (SSO) lets you sign in to Versori using your organisation's existing login service. Instead of a
separate Versori password, you use the same credentials you already use at work.

<Note>
  SSO is set up by your organisation's administrator. If you are unsure whether your organisation uses SSO, contact
  your administrator. If you're an administrator looking to set this up, see [Setting Up Single
  Sign-On](/latest/guides/sso/admin-setup).
</Note>

## How SSO works

Your administrator configures SSO for your organisation's email domain. When you enter your email on the Versori
sign-in page, Versori checks whether SSO is set up for your domain. If it is, Versori takes you to your
organisation's sign-in page instead of asking for a Versori password.

## Signing in with SSO

<Steps>
  <Step title="Enter your email address">
    Go to the Versori sign-in page, enter your work email address, and click **Continue**.
  </Step>

  <Step title="Sign in with your organisation">
    Versori takes you to your organisation's sign-in page. Enter your usual work credentials there.
  </Step>

  <Step title="Return to Versori">
    Once signed in, you are taken back to Versori automatically.
  </Step>
</Steps>

## Registering with SSO

To create a Versori account through SSO, you need an invitation from your organisation's Versori administrator.

<Steps>
  <Step title="Open your invitation link">
    Click the invitation link in the email sent to you. The Versori registration page opens with your email address
    already filled in.
  </Step>

  <Step title="Continue to your organisation's sign-in page">
    Click **Continue**. Versori takes you to your organisation's sign-in page.
  </Step>

  <Step title="Complete your profile">
    After signing in, Versori asks you to fill in a short profile — your role and how you plan to use the platform.
  </Step>
</Steps>

<Warning>
  Without an invitation, you cannot register on a domain that requires SSO. Ask your organisation's Versori
  administrator to invite you.
</Warning>

## Error messages

| Situation                                | Message                                                                                                                                                                                                                                         |
| ---------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| No invitation for an SSO-required domain | "You don't have access to Versori. Ask an administrator of your organisation to invite you."                                                                                                                                                    |
| SSO service is unavailable               | "Single sign-on is required for your organisation but is currently unavailable. Please contact your administrator."                                                                                                                             |
| Invitation link expired or invalid       | "We couldn't verify your invitation. Your invitation link may have expired or is no longer valid. Please try again, or contact the person who invited you for a new link."                                                                      |
| Already have a Versori password account  | "You already have a Versori account for this email. Continue signing in to your account below." Sign in with your password — if your organisation requires SSO, Versori then automatically takes you to a page where you can link your account. |