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Invoke functions from Action Blocks

Hi all

Microsoft Flow currently offers the possibility to invoke functions from Conditions blocks by clicking Advanced mode. This way we can access lots of useful staff defined in  Workflow Definition Language

Could it be possible to extend this option to Action blocks also?

This way we will be able to manipulate strings, add current date, etc.


Status: Completed

You can now include expressions in any action. Read more here:

Level: Power Up

Agreed.  Think of a Date coming in from a File from SharePoint - now I would like to create a Follow-up Task for a Salesman in CRM based on the creation of that File.


(In this case the File is a proposal, and I want to have the sales guy reminded to follow-up 5 days later). 


In addition, I would like to be able to create a corresponding Opportunity and set the estimated close date to FileCreationDate + 30 days.

Level: Power Up

I agree - functions or something like them would be incredibly useful

  • string manipulation
  • string builder from a collection - for example when rows are returned from SQL
  • working with dates
  • working with identiy objects (for instance, get a person from AAD / SharePoint / any other service and get access to user properties like email, etc)


Are you planning on adding any of these "utility functions" or would you instead rely on a utility service that could make these kinds of actions availble?

Level 10



I want to use "Workflow Definition Language" in my Actions.

For string manipulate, date caliculation, etc.

Just like, in "Condition - Advanced mode".


Without "Workflow Definition Language" in Action,

I need to use Azure Fuctions or developing new API or etc,

for add two strings, get first charactor ...



Yoshihiro Kawabata

Level: Powered On

I am "upvoting" this as well.  Flow is great, but I can't do what I need to do with it without access to the functions.

Level: Powered On

I find it hard to believe this is not yet possible (but you are right, it doesn't work). We cannot even do something as simple as change a file name to '*.pdf' when converting a file via Flow.