Quite a common requirements for Microsoft Flow is to use a multi-people field to create a single event in a calendar. You will probably start by creating a SharePoint list with a people field that can hold multiple people. Then you create a flow that triggers on the creation of an item in this list. Then you add a create event action in the Flow and  you end up with a flow like this:

That’s not nice. Flow has now added a Apply to each step. this then results into multiple events being created.

How do we solve this one?

I’m starting this by initialising 3 variables.


Now I’m setting 3 variables :

  • Attendee – is a copy of my email field. Although not really needed it does help when you debug the flow to have this available within the run history output
  • Attendees – The list of attendees that the flow is building up. this will be used for the create event action
  • Previous Attendees – This is a variable to store the values in temporarily as the set variablee doesn’t like to use the same variable to set and to reference within its new  value.

Again an Apply to each will appear, but this time I’m happy with that as I can now concatenate the attendees into a single string. It would be nice to just use 2 variables but it isn’t possible to assign a value to a variable using the value of the variable itself.

The concat fucntion looks like this

concat(variables(‘Previous Attendees’),’;’,items(‘Apply_to_each’)?[‘Email’])
concat(variables(‘Previous Attendees’),’;’,variables(‘Attendee’))

Then finally I adjust the required attendees in my event by using by attendees variable and all works as I wanted: