Microsoft Flow is a trigger-based system for creating automated workflows. There are lots of templates available, but if they don’t fit the bill for you then here’s how to create a brand new Flow from scratch.
You’ll need a free or paid-for plan to use Flow, so go ahead and sign up for one if you haven’t already. Head to the Office 365 app launcher (the nine dots in the top left corner) and click Flow to launch it.
Step One: Create a New Flow
The front page throws you straight into the templates, but we’re going to create a Flow from scratch, so click “My Flows” in the menu on the left-hand side.
If you’ve never created a Flow before then this page will be blank; otherwise, it’ll contain any flows you’ve previously created. Click New > Create from blank to start a new Flow from scratch.
You’ll be given the option to start from a popular trigger, but we’re going to start from nothing, so click the “Create from blank” button.
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Source: How-To Geek