Hi defaultwl52dzb8vl75,
Thank you for reaching out.
When you create a PDF from the emails, the attachment is added as a PDF attachment. To add the stamp, click on the attachment icon from the right-hand tool and then click on the attachment file. If it is a PDF, it will open in a new tab, and you can add the stamp. You will be asked to open the file if the attachment is not a PDF.
For more information on PDF attachments, refer to the following help document: https://adobe.ly/3JGYZfU.
Feel free to let us know if you have any questions.
Thanks,
Meenakshi
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