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How can I find folder paths for a shared mailbox?

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Posted on by Flashheart

Hi all. First post and a brand new user to Power Automate - and frustrated already.

I'm trying to test the template which creates a task in Planner when an email comes in to a shared mailbox. Seems simple enough.

I completed all of the requested parameters in the pre-built flow, but it fails and when I run the Flow Checker it tells me the 'folder ID' parameter can't be empty. The template never asked for a folder ID in the first place...

Anyway, I can't find out how to obtain a folder ID for the inbox of a shared mailbox no matter how hard I try! I've searched Google, asked Copilot and searched these forums, but I'm still none the wiser.

Is anyone able to help me out here? These things are NEVER as simple as they pretend to be!

Thanks in advance.

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Building flows

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trice602 15,402 Super User 2025 Season 2 on at

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Hi @Flashheart ,

Let's get this resolved this morning. Can you paste in a copy of your flow screen please?

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Flashheart 34 on at

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Hi @trice602 ,
Thanks for responding. Is this enough info? Actually, I said 'folder ID' when I really mean 'folder path', as you can see. I still don't know how to find that or format it for the flow...

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trice602 15,402 Super User 2025 Season 2 on at

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Hi @Flashheart ,

Please click on edit and then expand your 'when a new email arrives in a shared inbox (v2)' trigger; I need to see the settings.

The issue with templates, in my opinion, is they are not updated frequently and most likely, when this template was created and published, requirements have been added and the template, while still valuable, is not accurate. I know of a couple of other templates that are no up-to-date.

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Flashheart 34 on at

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How's this?

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trice602 15,402 Super User 2025 Season 2 on at

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Hi @Flashheart ,

Sorry, I know I said setting but meant parameter tabs.

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Flashheart 34 on at

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Ha. No problem. I should have sent both screens just in case!

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trice602 15,402 Super User 2025 Season 2 on at

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Hi @Flashheart ,

Here's the issue. (Most likely), the template you are using has an outdated trigger. Delete the trigger and re-add. Sometimes those definitions will not update in the new designer mode. Switch to classic. Delete there, then re-add. Save. Retest.

If I switch to code view, I can see my "folderID" is "Inbox" and this works. I do see you have a folder name selected in your advance settings but not sure if the definition is incorrect or something else.

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trice602 15,402 Super User 2025 Season 2 on at

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Hi @Flashheart ,

I think I figured it out. In your advance settings in parameters, for the folder selection, delete Inbox and then use the folder to select inbox, this will provide the folderID.

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Flashheart 34 on at

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@trice602 Thanks so much. I have a working automation now!

Actually I've learned plenty in the process here - the main thing being not to rely on templates. Now I'm getting the idea a bit more I'll try to start from scratch.

Really appreciate your time and patience on this. Thanks again.

(Have edited the post title to make it more accurate for anyone else finding this problem)

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trice602 15,402 Super User 2025 Season 2 on at

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Hi @Flashheart ,

Great to hear! Glad to help! I do use templates and refer to them, as framework, and if it works out-of-the-box, great! I use it but often I rebuild parts of it as needed.

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