Thanks Inbal for those extra details! It sounds like the file is on a local computer, so the end-user logs onto the client private network on an iPad.
Essentially, you're viewing a local file on a computer that you can access using an iPad. In this case, the file is still hosted locally. Can you try uploading the course to a web server and then viewing the course on an iPad?
If it's crucial to have the course secured in an environment, I'd recommend working with your IT team to determine which web environment is the best for your organization.