1. Write the custom email template in html. Wherever you want the link to the user activation or reset password to be, just add an <a> html tag with the link "LINK".
<a href="LINK">
An example html template is attached.
2. Upload the template to the correct S3 bucket in the ThingLogix root account.
bucket: thinglogix-foundry-files
folder: foundry-email-validation-template
sub-folder: <Foundry_root_account_id>
example: thinglogix-foundry-files/foundry-email-validation-template/eec4f000-52f1-11e8-9003-97198a913146
The name of the files are important and have to be called:
email_template.txt
forgot_email_template.txt (example in attached screenshot)