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Trying to create task on Planner and assigned to different buckets based on answer in Forms; getting "Schema validation has failed. Validation error.

I'm trying to create a Flow that creates a Task in Planner and dumps it into a planner Bucket based on the following question in Forms (each name has a bucket titled the same way in Planner):


Here is my Flow where I'm getting the following error--> "Schema validation has failed. Validation for field 'BucketId', on entity 'Task' has failed: The specified identifier is invalid."



Responsive Resident
Responsive Resident


I think You need the ID of the bucket instead (I assume you input the name).

The Bucket ID can be retrieved by list bucket action. Then filter the bucket ID against the name and add it to the task creation action.


Thank you for your response. Can you elaborate/ post a pic of the steps I'd need to add in PA?

Super User
Super User

@spinxt The Bucket Id requires the ID of your bucket, not the name of your bucket. In order to get your Bucket ID you'll need to add a List Buckets + Filter Array action to your flow.


Manual Trigger

First, I would recommend using a manual trigger while you build and create your flow. This way you don't need to leave Power Automate to trigger your flow. Once your flow is ready to go—create a copy of your flow and replace the Manual Trigger with an Automated Trigger. I always keep a manually triggered copy of my flows to help with troubleshooting at a later date or to test out any modifications I'd like to make to my flow. 


Response IDs are assigned sequentially. Depending on how many times you've filled out your form, you can enter any number in the Response Id field.



List Buckets

The List Buckets action will return an array of buckets from your selected Plan Id.


Run a test. Review the outputs. You need to filter out the bucket by the name (which is what the user will select in your MS Form) and return the Bucket ID for the Create Task action. 



Filter Array

Add a Filter Array action. In the From field, insert the value dynamic content from the List Buckets action.


In the first value field, insert the value Name dynamic content from the List Buckets action. Leave the operator as is equal to. Note: This operator will look for an exact match.


In the second value field insert the dynamic content from Get response details action that will output the bucket name. In my case it's the output from the Single Choice Option question.



Return Item Count

Whenever I use a Filter Array action, I always like to return the count of items returned in a Compose action. This is helpful when building a flow and can also be used to troubleshoot your flow. Insert a Compose action. Add an Expression. Use the length() function.



Select the Dynamic content tab and insert the body dynamic content from the Filter Array action into the length() function. Press ok and run a test.


Review the outputs of the Compose action. The Compose action should output a 1. If it has output a zero, this means that you need to troubleshoot your Filter Array action. As mentioned earlier, the is equals to is looking for an exact match. If there is an extra space or differences in cases, it will not filter your bucket as there isn't a match.


To learn more about how to use the Filter Array action, please refer to this YT Tutorial: Are you using the Microsoft Power Automate Filter Array Action wrong?


In this video tutorial I’ll show you 3 practical ways to use the Filter Array action and how to use it properly.

1️⃣ Cross-Referencing Data

2️⃣ Filtering by Key

3️⃣ Substring Matching


Did you know that the Condition action has a limit of 10 conditions? Although it might look like the Filter Array action can only accept one condition—this is not true. By using the advanced mode you can enter multiple conditions into a Filter Array action with an expression.



 3 Ways to Use the Filter Array Action

How to use the Scope Action to Group Actions

How to Check the Number of Items returned from a Filter Array Action

How to Cross-Reference Data in Excel with a SharePoint List

 How the Filter Array Action Works

 How to Access the Dynamic Content from a Filter Array Action

 How to Filter Items by a Key

How to Filter Items by Matching a Substring

How to Use Multiple Conditions in a Filter Array Action


Return Bucket ID

The Filter Array action will return an array of items even if it's only returned a single item. If you try to insert the Id dynamic content from the Filter Array action, the Create a Task action will automatically nest itself inside an Apply to Each action.



To avoid the Apply to Each action, you need to use an expression. You'll need the dynamic content key of the dynamic content you'd like to return. In this case, the bucket id. Take a look at the output from the Filter Array action. The dynamic content key is the red text between double quotes. In this case it's id in lower case. 



Insert a Compose action. The Compose action is optional. However, whenever I'm using expressions, I prefer to use Compose actions to ensure the output is what I expect. Tip: Rename your actions to keep your flow organized.


 The first item in an array is [0], second is [1], third is [2] and so on. Insert an expression. Add a question mark and a zero between square brackets (to return the first item). Insert square brackets and single quotes. Insert the dynamic content key between the single quotes—in this case it's id.



Press the up arrow key to go to the start of the expression and click on the dynamic content tab and insert the Body dynamic content from the Filter Array action. 


Run a test. Review the output. The Compose action should output the Bucket Id.


Now you can use the output of this Compose action in your Create a Task action. 



You might be interested in checking out these Power Automate/Planner tutorials:


️Automate Microsoft Planner Tasks: Create Tasks from SharePoint & Excel in Minutes


Do you want to quickly create tasks in Microsoft Planner from a SharePoint list or an Excel table? In this Microsoft Power Automate tutorial I’ll show you how to build a flow that will:

️ Create a task in Planner for each of your SharePoint list items

️ Create a flow that will trigger each time a new SharePoint list item is created

️ Create a tasks in Planner from an Excel Table

️ Add a description to your tasks



  How to bulk create Planner tasks from a SharePoint List

  How to use the Get Items action with a filter query

  Tips on creating a fast flow while building and testing

  How to create a string of email addresses from a multi-person choice column

  How to dynamically select a bucket in the Create a Task action

  How to use the Filter Array action

  How to use the Condition action

  How to use the Create a Task action

  How to automatically create a Planner task when a new SharePoint list item is created

  How to bulk create Planner tasks from an Excel Table

  How to add a task description to a Planner Task




How to Email Attachments 🖇 to Your Planner Tasks


When you add attachments to a Planner task from your computer, the files are automatically saved in the Documents document library of the SharePoint site associated with the M365 Group of your plan. Instead of downloading email attachments to OneDrive or SharePoint just so you can add them to a Planner Task—automate it.


In this Microsoft Power Automate Tutorial—I’m going to show you how build a flow that will take your email attachments and add them to a Planner task. All you need to do is copy a link to a task, forward the email to yourself and the attachments will be saved onto SharePoint and attached to your planner task.


At the end of the video I’ll show you how to use Trigger Conditions so this automation only runs when specific conditions are met.



 How to get the Message ID from an Email

 How to use the Get an Email (V2) action with a Manual Trigger

 How to use the split() function to split an email subject line

 How to use the Scope action to group your actions

 How to create a folder for email attachments on SharePoint

 How to use the Get Attachment (V2) action

 How to create attachment files in SharePoint

 How to use the Append to Array variable action to collect attachments

 How to add multiple attachments to a Planner Task

 How to switch a manual trigger to an automated trigger

 How to use Trigger Conditions in a when a New Email Arrives Trigger

 How to trigger your flow when only specific emails arrive


Hope this helps!

If I helped you solve your problem—please mark my post as a solution .
Consider giving me a 👍 if you liked my response!

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Responsive Resident
Responsive Resident


List buckets

Group-ID: PlannerGroupId

Plan-ID: PlannerPlanID



From : output of List buckets body/value

Left side of the filter: BucketName

Condition: equal to

Right side of the filter: the name of your form respons


Place this after the form action before you create the task. Make sure you use a first expression on the filter output to only get the first table row.


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