Start by logging into your Dispatch Anywhere settings page (Dispatch Anywhere Settings)
Select Accounts on the left toolbar and pick the first customer account. On the Invoicing tab, there is a check-box to "Show Photo URL on Invoice". This setting will need to be applied to all accounts that need this feature.
⭐Note: Job photos can be marked as public or private on your calls. The link on the invoice will only show public photos.