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

# Primary tenant

> Primary tenant

Let's look at what happens to user accounts in a multi-tenant scenario.

In a multi-tenant scenario, 1 of the tenants is designated as the **primary tenant**. The primary tenant is commonly the **1st or oldest tenant**.

<Danger>
  **Changing a person's username in the primary tenant will change the SuperID username!**

  The change is applied to each tenant the next time the person signs in to that tenant.

  It is not possible to change the username from any other tenant.
</Danger>

## Before SuperID

If a person has access to multiple tenants:

* The person has multiple standard SuperOffice user accounts.

* **If, and only if,** the person has chosen the exact same username and password for different tenants, the person will be asked to select a tenant when signing in. Otherwise, they are silently redirected.

## With SuperID

If a person has access to multiple tenants:

* One superID account is linked to multiple tenants (associate records).

* The person is **always** asked to select a tenant when signing in.


## Related topics

- [Known challenges with SuperID](/en/online/identity/superid/known-challenges.md)
- [User accounts and passwords](/en/online/identity/superid/user-accounts-and-passwords.md)
- [Tenant authorization](/en/developer-portal/tenants/authorization.md)
- [Request additional tenants](/en/developer-portal/tenants/get.md)
- [Tenant status webhook](/en/developer-portal/best-practices/tenant-status/get-notifications.md)
- [Check tenant status](/en/developer-portal/best-practices/tenant-status/check-status.md)