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Power Platform Community / Forums / Power Automate / Categories on Calendar...
Power Automate
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Categories on Calendar Invites Broken

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Posted on by 11

Following up on this thread, since it was not addressed and continues to be an issue:
https://learn.microsoft.com/en-us/answers/questions/4633152/new-outlook-calendar-invite-categories-not-applyin

Here is the step-by-step failure scenario:

  1. In Outlook, there's a category setup called "Team" that has the color blue.
  2. Receive a calendar invite.
  3. Automatically categorize the invite using Power Automate rules:
    1. URI: https://graph.microsoft.com/v1.0/me/messages/@{triggerOutputs()?['body/id']}
    2. Method: PATCH
    3. Content-Type: application/json
    4. Body: { "categories": ["Team"] }
  4. Calendar invite appears with "Team"/blue category in Outlook inbox.
  5. Accept the Calendar invite.
  6. In Outlook Calendar, invite no longer shows as blue/"Team".

Here's how this used to work in old Outlook:

  1. In Outlook, there's a category setup called "Team" that has the color blue.
  2. Receive a calendar invite.
  3. Automatically categorize the invite using Email Rules:
    1. From: (team member email)
    2. Assign it to the "Team" category
  4. Calendar invite appears with "Team"/blue category in Outlook inbox.
  5. Accept the Calendar invite.
  6. In Outlook Calendar, invite shows as blue/"Team".

In all previous outlook versions since the dawn of categorization, when you categorize the invite email, the corresponding invite in the calendar also takes the same categorization.

Currently, the only way to categorize the event in the calendar is to go to the calendar and change the category from the calendar. This is extremely cumbersome, especially when the event is on a different day/week/month.

This situation is completely unacceptable, Microsoft. In a massively meeting driven environment, this is a huge burden. Categorizations are broken.

Please address this. This is a huge user experience issue.

I have the same question (0)
  • Suggested answer
    David_MA Profile Picture
    14,956 Super User 2026 Season 1 on at
    I cannot speak to using the Graph API call to update the category of a calendar event, but is there a reason you don't want to use the Outlook Update Event Action?
     
     
    Before using the action, the label is NA IT:
     
     
    After the update the label is Global IT:
     
    Easy peasy… Since you posted this in February and it has not had a response, you may want to try the update event action until someone resolves the Graph API issue.
  • Assisted by AI
    David_MA Profile Picture
    14,956 Super User 2026 Season 1 on at
    I just noticed this was tagged as Power Automate Desktop. My suggestion above may not work since I don't use PAD as we use UiPath for RPA flows. Hopefully someone will have an answer for you. Maybe you can create a manually triggered flow and call that with PAD to update the category.
     
    After a discussion with Copilot, it says the issue you are having is due to a change in how authentication works in the new Outlook, which isn't supported by PAD. It says you need to run a PowerShell script to authenticate to the Graph API and then you can do the patch. Nothing I have ever done, so I will not even share what Copilot said to do since I cannot confirm it would work. But, you may want to ask Copilot about your issue and see if what it suggests makes sense.
  • Verified answer
    Sometech Guy Profile Picture
    11 on at
    Thanks David MA, I wasn't aware of the Update event option.
     
    I did eventually figure out a very complicated workaround that involved navigating from the email to the event, then changing the category. If I wasn't a Computer Science major, I would have given up long before I got it to work.
     
    This is still a major UX issue compared to the ease of setting a simple rule in Outlook rules. Power Automate is fantastic, but will overwhelm most users.

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