So a recent requirement put to me was to send an email to customers with a specific attachment.

There was also a requirement to ensure the right people would get the email but that was fairly straight forward and manageable through Advance Find/Fetch XML.

I was quite keen to avoid development of a custom workflow activity or plugin to cater for this business objective.

After some investigating I found a fairly straight forward solution:

1. Create an email template with the body/dynamic tags you wish to and attach the static attachment(in my case a PDF) here
2. Create your asynchronous workflow as you normally would with the conditional logic and trigger points
3. When adding the send email action, choose to use email template and call in the email template within the workflow

Simples :)!