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Survey123 supports common security models that are used by ArcGIS Online and ArcGIS Enterprise.

Typically, users sign in by typing a user name and password. Some organizations may require users to use alternative sign-in methods that include additional security. Security models supported by Survey123 include the following:

When typical sign-in does not work, signing in via a web browser that is external to Survey123 can be used. This is considered an advanced method and does have limitations, but it can be used when a public key infrastructure (PKI) with Windows Authentication is required.