Following the steps you can generate a random numer to be used inside a workflow
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Sometimes we need to generate a random number inside a workflow to be used on a list column for example.
This method is based using the Nintex action named "Call HTTP Web Service" and services provided by RANDOM.ORG
Requires Internet access
Any Nintex Workflow with the "Call HTTP Web Service" action enabled
Any SharePoint Server
You just need to configure 4 settings:
Here there is an attachment with a Nintex Workflow template to be imported on a Nintex Workflow for Sharepoint Online version.