Add file downloadable link in UI page from sys_attachment

[singhajeet]

How to add file downloadable links in UI pages from sys_attachment table.

I have tried a few options and putting anchor  value in the href like below

https://instance-name.com/ui_page.do?sys_id=12c0286a1b7161106c1aa86fe54bcb54

I am getting errors like 

Requested attachment does not exist

Even file is there I can able to download it from the sys_attchment table

@Ankur Bawiskar, Please help me on the same.

[singhajeet]

@Ankur Bawiskar Only internal users can access the page. I mean who has service now dashboard access. They can only view the page and click on the download button link