# Organizations
ZenML Pro arranges various aspects of your work experience around the concept of an **Organization**. This is the top-most level structure within the ZenML Cloud environment. Generally, an organization contains a group of users and one or more [workspaces](/pro/core-concepts/workspaces.md).
## Inviting Team Members to Your Organization
Inviting users to your organization to work on the organization's workspaces is easy. Simply click `Add Member` in the Organization settings, and give them an initial Role. The user will be sent an invitation email. If a user is part of an organization, they can utilize their login on all workspaces they have authority to access.
## Trusted domains
ZenML Pro can optionally associate trusted email domains with your organization. That setting affects user discovery when inviting people and how some organization invitations behave with SSO. See [Trusted domains](/pro/access-management/trusted-domains.md).
If your organization runs on ZenML-managed ZenML Pro, trusted domains are maintained by ZenML operators. To request or change trusted domains, [contact ZenML support](https://zenml.io/slack) or your account contact.
If you self-host the ZenML Pro control plane, super-user administrators configure trusted domains through the API as described in [Trusted domains](/pro/access-management/trusted-domains.md).
## Manage Organization settings like billing and roles
The billing information for your workspaces is managed on the organization level, among other settings like the members in your organization and the roles they have. You can access the organization settings by clicking on your profile picture in the top right corner and selecting "Settings".
## Other operations involving organizations
There are a lot of other operations involving Organizations that you can perform directly through the API. You can find more information about the API by visiting .
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