Power Platform Community Forum Thread Details

I tried using Power Automate online yesterday, but I kept getting an error message saying the flow would no meet DLP requirements and data leaving the organisation; which I don't understand as it was either Outlook to OneDrive for Business or Outlook to SharePoint.

I though Power Automate Desktop may be another option, so I have been playing for a couple of hours but having more different issues. I want a flow to find emails containing DMARC reports and then save the attachments in either OneDrive or SharePoint, finally move processed emails into mail subfolder Inbox\dmarc

Unable to add multiple email addresses into the PA email criteria, I tried splitting using comma and semicolon... no joy
Was successful one time, but after filtering emails but every time since the flow fails saying that it is unable to find the Inbox\dmarc folder
- Super frustrating! not sure if a process is locking the Outlook datafile maybe? if that is the case not sure how I can solve it

I then thought I would try instead of using the Outlook module I would try the Microsoft Exchange module, as I have Exchange online but that won't authenticate, showing error "Failed to connect to the exchange server", I as this is due to it not prompting me me OAuth?

What am I doing wrong folks, am I over complicating this? please help

Thanks

Categories:

Power Automate Desktop

@CU02081400-1

You're trying to build a Power Automate flow (cloud or desktop) to extract DMARC report attachments from emails and save them to OneDrive or SharePoint, then move the processed emails to a subfolder (Inbox\dmarc). You've encountered several issues, including:

DLP (Data Loss Prevention) policy blocks in Power Automate cloud.
Folder not found errors in Power Automate Desktop.
Authentication failures with the Exchange module.

Let’s break this down and address each issue with insights from internal documentation and community forums.

🔐 1. DLP Policy Blocking Cloud Flow

Your flow from Outlook to OneDrive or SharePoint is being blocked due to Data Loss Prevention (DLP) policies. Even though all services are Microsoft-owned, your tenant admin may have classified Outlook as a business connector and OneDrive/SharePoint as non-business, or vice versa. This mismatch triggers the DLP block.

Fix:

Ask your Power Platform admin to review and adjust the DLP policy in the Power Platform Admin Center.
Alternatively, use Power Automate Desktop, which is not subject to DLP policies
1
.

🖥️ 2. Power Automate Desktop: Folder Not Found

You're getting errors like “unable to find the Inbox\dmarc folder.” This is a known issue when:

The folder path is case-sensitive or incorrectly formatted.
The Outlook data file is locked by another process.
The folder hasn’t been synced locally or is nested incorrectly.

Fixes:

Use the “Get subfolders” action to dynamically list and verify the folder path.
Try using Inbox\\dmarc or Inbox/dmarc depending on the module.
Ensure Outlook is open and not syncing or locked by another process.
Restart Outlook and Power Automate Desktop to release any locks
2
.

📧 3. Multiple Email Addresses in Filter

Power Automate Desktop doesn’t support comma- or semicolon-separated lists in the email filter field.

Workaround:

Use a loop to iterate through a list of sender addresses and apply the filter individually.
Or use a regular expression in the filter condition if supported.

🔐 4. Exchange Module Authentication Failure

The error “Failed to connect to the exchange server” is likely due to missing OAuth prompt or unsupported authentication in the desktop module.

Fixes:

Use the Outlook module instead of Exchange if you're on Microsoft 365.
If you must use Exchange, consider switching to Power Automate cloud with a premium connector or use Graph API via HTTP actions.

🏷️ Tag me if you have any further questions or if the issue persists.

✅ Click "Accept as Solution" if my post helped resolve your issue—it helps others facing similar problems.

❤️ Give it a Like if you found the approach useful in any way.