When migrating a Nintex workflow from Microsoft 365, the following message appears :
The credentials for [provider name] have not been defined in the External providers configuration, but the following actions require them: [name of actions]
Sharegate supports migrating actions containing credentials for external providers from Microsoft 365, but cannot migrate the actual credentials used. The action will be migrated, but will not work properly.
You will need to configure the credentials for the action's provider before migrating the workflow. You can learn more about this configuration step Nintex FAQ.