Automatic Microsoft Outlook attachment storage to OneDrive with Excel logging

📥 Save Email Attachments to OneDrive & Log Them in Excel

This workflow watches your Outlook inbox, automatically downloads file attachments (for example invoices), saves them into a specific OneDrive folder, and logs each file name into an Excel table. Optionally, it also posts a Microsoft Teams message to let you know that a new attachment has been processed.

✨ What this workflow does

• Monitors a Microsoft Outlook mailbox for new emails.
• Fetches all attachments from each incoming message.
• Processes attachments one by one so every file is handled cleanly.
• Downloads each attachment as binary data.
• Uploads the file into a OneDrive folder (looked up by name).
• Appends a new row with the filename to an Excel table for tracking.
• Sends a Teams chat notification once an attachment has been uploaded (optional).

🧑‍💼 Who this is for

This workflow is ideal for:

• Finance / accounting teams who receive invoices by email and want them stored centrally.
• Anyone who wants an “email → OneDrive → Excel log” pipeline without manual downloading and renaming.
• n8n users who work in a Microsoft 365 environment (Outlook, OneDrive, Excel, Teams).

✅ Requirements

Before you run the workflow, you’ll need:

• A Microsoft Outlook account with permissions to read emails and attachments.
• A OneDrive / SharePoint drive with a target folder (the example uses a folder whose name matches the search in the Get Folder ID node, e.g. Testn8n).
• An Excel workbook stored in OneDrive with:
  • A worksheet and table already created.
  • A column named Filename (or adjust the Set Filename + Excel node to match your column name).
• n8n credentials set up for:
  • Microsoft Outlook
  • Microsoft OneDrive
  • Microsoft Excel
  • Microsoft Teams (optional but used in this template)

🛠️ Setup steps

1. Import the workflow JSON into your n8n instance.
2. Configure credentials:
   • Set your Outlook, OneDrive, Excel, and Teams credentials on the respective nodes.
3. Adjust the mail trigger (On Mail Received):
   • Optionally add filters (subject, sender, folder) if you only want to process invoices or a specific mailbox/folder.
4. Set the OneDrive folder search (Get Folder ID):
   • Update the query parameter to the exact name of the folder where attachments should be stored.
5. Point the Excel node to your workbook (Append to Excel Log):
   • Use the dropdowns to select your workbook, worksheet and table.
   • Ensure there’s a Filename column (or rename the field in Set Filename to match your actual column).
6. Activate the workflow:
   • Once active, every new email that hits the trigger will have its attachments stored in OneDrive and logged in Excel.

🔗 Integrations used

• Microsoft Outlook – trigger on incoming emails and download attachments.
• Microsoft OneDrive – search for folders and upload files.
• Microsoft Excel – append rows to a table in a workbook.
• Microsoft Teams – send notifications when attachments are processed.