Hello Angelia,
Once you enable the SSO-only setting, your Authorized Organizations (i.e., partners to whom you've granted access to your PureCloud org) will still be able to access your organization in the same way that they did previously. They will not need to use SSO to access your organization.
In other words, this setting only affects the users logging in directly to the org - not those users who access your org from an external org.
Please let me know if you have any further questions!
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Becky Powell
Principal Product Manager, PureCloud Open Platform
Genesys - Employees
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