Link to training in outside third part LMS

Summary

Has anyone created a link (deep I assume) to a third party external LMS?

Content

I have a course that my users need to take on a vendor site.   The course is an online course in their LMS.   

I was wondering if anyone has done a deep link or anything like that into the third party LMS>   

• If so how did you do it? 
• Did you create a course and use a deep link in the course?   
• Did you import the course into the learn environment? 
• How did you tie it to a learning plan?
• How does it show a completion?