Hi,
You need to receive a link from your employer. Here is more information about HUP. Here is the FAQ page for the Home Usage Program (HUP).
https://www.microsofthup.com/hupus/faq.aspx
Here are installation help links for after you have purchased.
https://support.office.com/en-gb/article/Instal...
https://support.office.com/en-us/article/get-he...
Here is the general HUP help link:
https://www.microsofthup.com/hupus/en-US/contactus
If above doesn't work - then you will have to contact Digital River who manages this program for Microsoft.
http://store.digitalriver.com/store/msdocs/Cont...
This forum is a user-to-user support forum. I am a fellow user.
I hope this information helps.
You are asked below whether this response solved your problem, please do not answer that question for this or any response unless the answer is "yes" or unless you feel that the response is not helpful to you in resolving your problem. Otherwise it reports the response as not being helpful. A "no" answer on any response will not give you any more help than not answering but will give negative reinforcement to the person who responded. On the other hand, a "yes" answer to that question helps other users with the same or a similar question by directing them to the response.
You can ask for more help by replying to this post (Reply button below).
Please let me know if you have any more questions or require further help.
Regards