Knowledge Base

Workflow Won't Send Emails With Attachments

  • 3 February 2023
  • 0 replies

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The Send Notification action, configured to 'Include list item attachments' or other attachments, causes the workflow to fail with the following error:


The filename, directory name, or volume label syntax is incorrect.



Remove special characters from the file name. These limitations include:


~ ' # % & * : < > ? / \ { | }


Please note that these special character limitations are imposed by Microsoft and is enforced differently across different products and functionalities. For example, SharePoint may allow you to upload a document with a # sign, but SharePoint may fail to retrieve the same document for use as an email attachment due to the same # sign. You may find differing behavior between SharePoint 2013, 2016, and 2019.

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