Stax now supports disabling invitations for local users. A local user is one which does not authenticate via a configured Single Sign-On Identity Provider (SSO IdP).

By default, administrators of a Stax tenancy can invite users directly to Stax, at which point they can create a password and log into Stax. Alternatively, administrators can grant users access to Stax via the organization's SSO IdP. Users logging in to Stax via Single Sign-On are created just-in-time and do not need to be invited to Stax first.

If you wish to disable the ability for administrators to invite new local users to Stax, please raise a support case.

See Enforce Single Sign-On for more detail.