We are sending an email using an email template to an internal user that will have a link to an internal Knowledge article in it.
Currently I have the URL hard-coded like so: https://na29.salesforce.com/articles/How_To_Docs/How-to-Do-This
What merge field can I use in an email template to get the Instance needed to generate a URL to an internal knowledge article?
We have an upcoming Instance Refresh so na29 will no longer be valid.
Is there a merge field I can use in place of the na29 or even in place of the na29.salesforce.com so I can recreate the URL that is needed to the Knowledge article?
*edit: I am using an email template type of Custom not Visualforce.
We are not setting up My Domain yet.