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Hi everyone,

I'm trying to build a Power Automate flow that triggers whenever a specific category is assigned to an email in my Outlook inbox (e.g. "Red", "Follow-up", etc.).

The idea is to use Outlook categories as a manual classification system, and then let Power Automate handle downstream actions (move, forward, log to SharePoint, notify in Teams...).

my questions

Is there a native trigger that fires when a category is added or changed on an existing email?

If not, is there a recommended workaround? I've seen mentions of Graph API subscriptions / webhooks on messages resources — has anyone implemented this with Power Automate (custom connector or HTTP action)?

Would Outlook rules + a flag/move action be a viable bridge to convert a category change into an event Power Automate can catch?

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Building flows

Process mining

Hi @QX-13051355-0,

Unfortunately, the Outlook 365 connector doesn't have a trigger action which supports this.

A workaround could be:

- Use the flag mechanism and both flag and assign a tag, this way you can use the when an email is flagger trigger

- Use a recurrence/schedule flow instead with a Graph API call

I like the second approach.

Below is an example of that.

1. Run the flow for example every hour

2. Use the below query if any new emails with the Red category are received in the last hour

https://graph.microsoft.com/v1.0/me/messages?$filter=categories/any(c:c eq 'Red') and receivedDateTime gt @{addHours(utcNow(), -1)}

Happy to help out 😁

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