Claim domains for your organization

With Slack Enterprise Grid, make it easier for new users to find and join teams on your organization by claiming or whitelisting additional domains.

Bonus: Domain whitelisting helps prevent unsanctioned teams from cropping up outside your grid.


Claim your organization's domains

Claiming domains is easy! Simply contact us and let us know which additional domains you'd like to add to your organization’s whitelist. 🏁


When a person tries to create a new team using a domain you’ve already claimed, they will see one of two messages:

  • Your organization is already using Slack
    The user can sign in with SSO to create an account on your organization.
  • Only Org Admins can create new teams on your organization
    The user will need to contact an Org Admin for help creating a team on your organization.

Note: To remove domains you no longer need, send us a note. We’d be happy to help.

Non-Enterprise teams: On the Standard or Plus plan with G Suite SSO set up, you can whitelist additional domains to let people from other companies join your team. Tell us which ones you'd like to add.

Who can use this feature?
  • Organization Owners can access this feature.
  • Available on Slack for Enterprise.

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