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How to Fix Merge Tools Add-In Duplicate Emails and Add PDF Paths

Muhammad TalhaMuhammad Talha Oct 12, 2026 869 views

Question details

The user is experiencing issues with the Merge Tools add-in, including emails sending twice or failing to send entirely, and needs instructions on how to insert PDF file paths into their Excel mail merge data source.

How to Fix Merge Tools Add-in Duplicate Emails and Add PDF Attachment Paths
Product
Merge Tools Add-In for Microsoft Office
Device & OS
not provided
Scenario
Executing a mail merge operation that includes customized PDF attachments using an Excel data source.
Observed behavior
The add-in sends duplicate emails, fails to send outgoing messages, and leaves the user unable to link individual PDF attachment file paths to correct recipients in Excel.
Before you start

Ensure that your Microsoft Outlook application is open, online, and configured with the correct primary email account before initiating the mail merge process.

Solution 1Recommended

Resolve Duplicate Emails and Find Unsent Messages

Use these steps to prevent the add-in from sending duplicate emails and to recover messages that failed to process during the merge.

Duplicate emails are often caused by inadvertently running the merge process multiple times. Unsent messages usually end up in the Drafts folder if the wrong account is active or the send command was interrupted.

1
Verify single execution

Ensure that you only run the mail merge process once. When prompted by the Merge Tools add-in, make sure to explicitly click the 'Send Now' option rather than queuing the messages repeatedly.

2
Check the Outlook Drafts folder

If you notice that messages were not sent to recipients, open Microsoft Outlook and navigate to your Drafts folder.

3
Locate the Merge Tools subfolder

Within the Drafts folder of your correct email account, look for a specific folder named 'Merge Tools'. Any failed or pending outgoing mail merge messages will be stored here for review.

Resolve Duplicate Emails and Find Unsent Messages
Account Selection: Always double-check that the correct sender email account is set as your default in Outlook before starting the merge.
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Frequently Asked Questions

Why did my mail merge emails go straight to the Drafts folder?

Emails are sent to the Drafts folder if Outlook is offline, if the 'Send Now' option was not selected in the Merge Tools add-in, or if the system detected a configuration issue with the default sender account.

How do I remove the quotation marks around the file paths in Excel?

When using 'Copy as path' in Windows, quotation marks are automatically added. To remove them, highlight the column in Excel, press Ctrl+H to open the Find and Replace dialog, type a quotation mark (") in the 'Find what' box, leave 'Replace with' blank, and click 'Replace All'.

Can I send multiple PDF attachments to one person?

Yes. Depending on the specific configuration of the Merge Tools add-in you are using, you can typically include multiple file paths in the same Excel cell by separating them with a specific delimiter, such as a semicolon (;).