Question
Answer
Both Nintex Workflow 365 and Nintex Form 365 are hosted inside Microsoft Azure.
When the Workflow designer page is retrieved from the Nintex servers, it is rendered within the browser. When the end user publishes the workflow, the workflow is compiled within the Nintex server, and is then published into Office 365's workflow engine.
From there, the workflow is executed inside of Office 365, and will make API calls to Office 365 and external Nintex Live services where the workflow design requested those capabilities.
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