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Fix Power Automate Cannot Find a Slack Channel for Microsoft Forms

Camila Milosovich Oct 9, 2026 869 views

Question details

The user is trying to configure a Power Automate flow but cannot find their target Slack channel in the dropdown menu.

How to Fix Power Automate Not Finding a Slack Channel

Product: Power Automate
Device & OS: not provided
Scenario: Creating a Power Automate flow to send notifications from Microsoft Forms to a specific Slack channel.
Observed behavior: The target Slack channel does not appear in the Channel Name field when configuring the Slack connector.

Before you start

Ensure you have the correct administrative or member permissions in your target Slack workspace, and verify that your Power Automate account is properly logged into the Slack connector.

Solution 1Recommended

Use a Custom Value for the Channel ID

Bypass the dropdown limitation by manually locating your Slack channel ID and entering it as a custom value in Power Automate.

Power Automate sometimes fails to load all available channels, especially in workspaces with a large number of channels or when trying to access private channels. Using the direct Channel ID ensures the flow routes correctly regardless of the dropdown menu.

Find the Slack Channel ID

Open Slack in your web browser, navigate to the missing channel, and look at the URL. Copy the last string of alphanumeric characters (usually starting with a 'C').

Select Custom Value in Power Automate

Return to your Power Automate flow setup, click the dropdown for 'Channel Name', scroll to the bottom, and select 'Enter custom value'.

Paste the Channel ID

Paste the copied Slack Channel ID into the field and save your flow. Test the flow to ensure Microsoft Forms notifications are delivered successfully.

Private Channels: If the channel is private, you must also explicitly invite the Power Automate app into the Slack channel by typing '/invite @Power Automate' in the Slack chat.

Solution 2

Consult the Power Automate Community

Seek specialized assistance for persistent integration and connector configuration issues.

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Frequently Asked Questions

Why are private Slack channels not appearing in Power Automate?

By default, Power Automate can only discover public channels. To post to a private channel, you must manually add the Power Automate bot to that specific channel in Slack or enter the Channel ID as a custom value.

Does my organization's policy block Slack connections in Power Automate?

Yes, Data Loss Prevention (DLP) policies enforced by your IT administrator can restrict the ability to pass data between Microsoft Forms (a Microsoft 365 service) and Slack (a non-Microsoft connector). You may need to request an exception from your IT department.

How do I refresh the Slack connection in my flow?

Go to the 'Data' section in the left pane of Power Automate, select 'Connections', find your Slack connection, click the three dots, and choose 'Switch account' or delete and recreate the connection to refresh your access tokens.

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