Zoho CRM in Microsoft Power Automate Custom Connector

Zoho CRM in Microsoft Power Automate Custom Connector

Hi everyone,

I’m building a Power Automate flow that integrates Microsoft Bookings with Zoho CRM. The goal is to automatically create a meeting (event) in Zoho CRM whenever a new appointment is booked via Microsoft Bookings.

To achieve this, I created a Custom Connector in Power Automate:
Base URL: /crm/v2
Endpoint: /Events
Method: POST
Authentication: OAuth 2.0 using Zoho EU (https://accounts.zoho.eu/oauth/v2/token)
Scope: ZohoCRM.modules.ALL

In the connector’s test tab, I enabled Raw Body and used the following payload:

{

      "data": [

            {

            "Subject": "Consultation with John Doe",

            "Start_DateTime": "2025-08-12T10:00:00+02:00",

            "End_DateTime": "2025-08-12T10:30:00+02:00",

            "Description": "Booked via Microsoft Bookings"

            }

      ]

}


However, when I test the operation, I receive a 400 INVALID_REQUEST error from Zoho CRM with the message: "unable to process your request. please verify whether you have entered proper method name, parameter and parameter values."

The Headers of the error message is:

{

  "cache-control": "private,no-cache,no-store,max-age=0,must-revalidate",

  "content-length": "192",

  "content-security-policy": "default-src 'none';frame-ancestors 'self'; report-uri https://logsapi.zoho.com/csplog?service=crm",

  "content-type": "application/json;charset=UTF-8",

  "date": "Tue, 12 Aug 2025 10:14:26 GMT",

  "expires": "Thu, 01 Jan 1970 00:00:00 GMT",

  "pragma": "no-cache",

  "referrer-policy": "strict-origin",

  "strict-transport-security": "max-age=64072000; includeSubDomains; preload",

  "x-content-type-options": "nosniff",

  "x-download-options": "noopen",

  "x-frame-options": "SAMEORIGIN",

  "x-ms-apihub-cached-response": "true",

  "x-ms-apihub-obo": "false",

  "x-ms-dlp-ef": "-|-/-|-|-",

  "x-ms-dlp-gu": "-|-",

  "x-ms-dlp-re": "-|-",

  "x-ms-environment-id": "default-80ed74fa-8f44-4a36-9520-c03e719ed98a",

  "x-ms-mip-sl": "-|-|-|-",

  "x-ms-tenant-id": "80ed74fa-8f44-4a36-9520-c03e719ed98a",

  "x-xss-protection": "0; mode=block"

}

 

The Body of the error message is:

{

  "code": "INVALID_REQUEST",

  "details": {},

  "message": "unable to process your request. please verify whether you have entered proper method name, parameter and parameter values.",

  "status": "error"

}

 

I’ve confirmed the endpoint is /crm/v2/Events, the headers are correct (Content-Type: application/json, Accept: application/json), and authentication is successful.

What could be causing this error, and how can I resolve it?
Thanks a lot to anyone who can help!

Best, 
Martin

    • Recent Topics

    • How to calculate separate totals for Product Line Items filtered by category in Quotes?

      Hello! I'm working with Quotes in Zoho CRM and need help calculating conditional totals for line items. Current setup: I have two tables in my Quote template (Zoho Writer), both displaying Quoted Line Items Table 1 (top): Shows all products where Product
    • Add "Fetch Composite Item" Action for Inventory

      I want to make a Flow that uses information returned in the GET call for Composite Items, and it's not currently available in Zoho Flow. Please consider adding this functionality.
    • Zoho Social/Marketing Plus - Addition to "Monitor" function

      It would be very helpful if the Monitor function would allow us to add a column to monitor hashtags in addition to pages and mentions. This is a common and very valuable function in other social listening tools.
    • Almacenamiento

      Hola, Quisiera saber como podría hacer para bajar el almacenamiento de 5gb a mis usuarios, en otras palabras los quiero ir limitando de la cuota real, y luego ir agregando poco a poco la cantidad hasta llegar a los 5gb que me dan en el plan free. 
    • Zoho Invoice Now Supports VeriFactu for Businesses in Spain

      Starting from January 1, 2026, Spain requires real-time invoice reporting for all B2B transactions. From July 2026, this requirement will extend to B2C transactions as well. All reporting must be carried out through the VeriFactu to AEAT (Agencia Estatal
    • Will I Get a Refund If I Downgrade Zoho Mail?

      Hello, We upgraded an email account for our new employee. However, the employee left after one month, and now I've reduced the number of Zoho Mail users from 7 to 6. Can we get a refund for the remaining portion of our annual payment?
    • Zoho Billing Now Supports VeriFactu for Businesses in Spain

      Starting from January 1, 2026, Spain requires real-time invoice reporting for all B2B transactions. From July 2026, this requirement will extend to B2C transactions as well. All reporting must be carried out through the VeriFactu to AEAT (Agencia Estatal
    • how to add subform over sigma in the CRM

      my new module don't have any subform available any way to add this from sigma or from the crm
    • Introducing the revamped What's New page

      Hello everyone! We're happy to announce that Zoho Campaigns' What's New page has undergone a complete revamp. We've bid the old page adieu after a long time and have introduced a new, sleeker-looking page. Without further ado, let's dive into the main
    • Zoho Books - France

      L’équipe de Zoho France reçoit régulièrement des questions sur la conformité de ses applications de finances (Zoho Books/ Zoho Invoice) pour le marché français. Voici quelques points pour clarifier la question : Zoho Books est un logiciel de comptabilité
    • Name autocomplete

      Hi, During searching emails the web tool does not always propose the auto-completion of the saved emails. As a result I either have to go to contacts and look up the exact email, or the exact full name including the middle name and any dots, which is very annoying. For example I have a contact that I emailed in the past that has "First M. Last" <email@email.com> type of contact. When I start typing 'First' the email may or may not pop up in the autocomplete menu. Then if I start typing "first last"
    • Using a CRM Client Script Button to create a Books Invoice

      Hello, I need help handling error messages returned to my client script from a function. The scenario I have setup a client script button which is available from each Deal. This CS executes a crm function, which in turn creates an invoice based on the
    • Why Format section gets disabled when we create Merge Template over PDF

      I need some assistance I have a Client who is going to give certificates to users who passes his exam. So, I am using mail merge but in ZOHO writer after I upload the PDF and create merge Template over PDF the format Section gets disabled. My problem
    • Possible to connect Zoho CRM's Sandbox with Zoho Creator's Sandbox?

      We are making some big changes on our CRM so we are testing it out in CRM's Sandbox. We also have a Zoho Creator app that we need to test. Is it possible to connect Zoho CRM's Sandbox to Zoho Creator's Sandbox so that I can perform those tests?
    • How do i follow up my email campaign in-thread

      Is there a way to follow up the email campaign so that it is in-thread using zoho campaigns? eg customer gets original email with subject line "hello" then 5 days later follow up would be with subject line "RE: hello".
    • Announcing new features in Trident for Mac (1.29.0)

      Hello everyone! Trident for macOS (v1.29.0) is here with new features and enhancements to enhance your business communication. Let's take a quick look at them. Access shared mailboxes. You can now view and access shared mailboxes in Trident, which are
    • Books is extremely slow again today !

      Everything is running slowly even with 500mb connection speed
    • Cyclic dependencies in many-to-many relationships...

      I have an application which includes a form for companies, and a form for contacts. Each company can be assigned 1 technical and 1 administrative contact. I have this working okay so far, but I want to copy the scripts used so far to a new empty application. When I import the scripts it fails with a message that says: Problem encountered while creating the application Error in resolving form dependency:Cyclic dependency among the forms:[Company, Contact] What can I do to resolve this? After all,
    • Zoho Workdrive for Office, "vsto runtime not found"

      Hi all, I have been trying to get ZohoWorkdrive_MS-addin_1.4.exe installed, but I keep getting the error "VSTO Runtime Not Found!" - even though I have installed it ... Anyone else hear had problems with the MS addin?  FYI, I am using O365 on A Dell laptop running Win 10 Home - fully patched and up-to-date.  I have tried compatibility modes and running explicitly as Administrator - the usual steps. Any advice would be appreciated.
    • Zia’s AI Assist now helps you write clearer notes — in seconds

      After helping recruiters craft job descriptions, emails, and assessments, Zia’s AI Assist is now stepping in to make note-taking effortless too. Whether you’re recording feedback after an interview or sharing quick updates with your team, you can now
    • Zoho API to create ticket

      I'm developing an integration to create tickets via API, but, locally it works (send and recieve requests). In production it also works sending requests, but, my file don't recieve any response data. My URL is available in Zoho API Console and I have
    • Automate Timesheet Approvals with Multi-level Approval Rules

      Introducing Approval Rules for Timesheets in Zoho Projects. With this automation, teams can manage how timesheets are reviewed and approved by setting up rules with criteria and assigning approvers to handle submissions. Timesheet, when associated to
    • Building Toppings #1 - Serving your needs with Bigin Toppings

      Hey Biginners! We're excited to kick off our Developer Community series on building toppings for Bigin, and our goal is to provide an accessible, beginner-friendly, and relevant path for every developer. Imagine creating tiny pieces of software that unlock
    • Can we create Sprint with tasks from Multiple projects?

      Hi Team, We were using Zoho Sprints for quite sometime. Currently we have started the process of Sprint method. We couldnt create the active sprint board with the tasks from multiple projects. I would like to know whether this is possible or Any timeline
    • Tip of the Week #74– Create automated workflows in MS Power Automate

      Zoho TeamInbox now connects directly with Microsoft Power Automate, letting you streamline everyday routines tasks such as from sending emails to managing threads, with automated workflows. About the integration Zoho TeamInbox integrates with Microsoft
    • Account validation

      Hello everyone, I registered my account on ZeptoMail to use the system, but the problem is that the verification period on Zepto's end has already passed and I have limited functionality.
    • Paste issues in ZOHO crm notes

      Hi, since a week or so I have issues with the paste function in ZOHO CRM. I use "notes" to copy paste texts from Outlook emails and since a week or so, the pasting doesnt function as it should: some text just disappears and it gives a lot of empty lines/enters.....
    • Is it possible to add a gradient color to a newsletter im designing?

      From where i sit it looks like you can only choose a single color but not combine 2 colors?
    • New Feature: Audit Log in Zoho Bookings

      Greetings from the Zoho Bookings team! We’re excited to introduce Audit Log, a new feature designed to help you track all key actions related to your appointments. With Audit Log, you can maintain transparency, strengthen security, and ensure accountability.
    • Custom validation in CRM schema

      Validation rules in CRM layouts work nicely, good docs by @Kiran Karthik P https://help.zoho.com/portal/en/kb/crm/customize-crm-account/validation-rules/articles/create-validation-rules I'd prefer validating data input 'closer to the schema'
    • Customised Funnel

      We are running the standard plan for our ZOHO CRM. I have been asked if there is a way to combine data from the Calls module, Deals module and Contact Module into 1 funnel, similar to the view you can get when viewing Deals By Stages, you can see the
    • Good news! Calendar in Zoho CRM gets a face lift

      Dear Customers, We are delighted to unveil the revamped calendar UI in Zoho CRM. With a complete visual overhaul aligned with CRM for Everyone, the calendar now offers a more intuitive and flexible scheduling experience. What’s new? Distinguish activities
    • Account disabled

      I have an issue I need help with. Whilst trialing ZOHO CRM I created the following: Account1 (-------------) using m__ame@m__rg___s__i__.___.__ and 2 personal emails Account2 (-------------) using a personal email and 2 users _al__1@______________._o_.__
    • Blocked Email

      We are a Zoho One subscriber and use Yahoo as our MX provider. A few times each year, for the past four years, CRM blocks one or more of my Zoho One users from receiving internal email from CRM. This includes "@mentions" in all modules, and emails from
    • message var is empty in bot mention handler

      Hi, I'm encountering a problem: in my bot's mention handler, I want to retrieve the text the user typed when mentioning the bot. Example: On the #tests-cyril channel, I send this message: “@Donna hello how are you ?” I expect the system variable "message"
    • Remembrance Day to Remember – Recalling Values

      The phrase “at the eleventh hour” refers to the 11th hour of the 11th day of the 11th month in 1918, when the hostilities of World War I came to an end—but it still holds meaning today. Remembrance Day (Veterans Day in the US) is observed on November
    • Enhancing Zia's service with better contextual responses and article generation

      Hello everyone, We are enhancing Zia's Generative AI service to make your support experience smarter. Here's how: Increased accuracy with Qwen One of the key challenges in AI is delivering responses that are both contextually accurate and empathetic while
    • How to display two measures (sales and price) divided by categories on one line chart

      Hi everyone, I’m having trouble figuring out how to display two columns on a line chart with category breakdowns. What I need is a line chart where one line represents Sales and the other represents Price. However, the Price data is divided into around
    • Create custom rollup summary fields in Zoho CRM

      Hello everyone, In Zoho CRM, rollup summary fields have been essential tools for summarizing data across related records and enabling users to gain quick insights without having to jump across modules. Previously, only predefined summary functions were
    • Introducing the locking option for CRM records

      Last modified on 06/04/2023: Record locking option in CRM is now available for all Zoho CRM users in all DCs. Note that it was an early access feature available only upon request. Hello All, Hope you're doing well! We're thrilled to introduce our latest
    • Next Page