Thank you for your message.
I would like to give each employee access credentials stored in the RU Server to associate with and show only the address book of the PCs to which they can have access.
Here we would recommend that you extensively use groups rather than specific accounts, especially for setting access permissions. Using groups will allow you to quickly change a person's permissions set by moving them from one group to another (or simply deleting them from their group altogether if they leave the company/organization).
I would like to register the license to a single company that deals with the maintenance of all PCs on my behalf.
Would you recommend the type of license?
You may consider our SITE license. This is an all-unlimited license issued for an organization (in this case you'll be that organization).
As far as distance learning is concerned, is it possible to use your software?
To some extent, yes. But truth be told, Remote Utilities is first and foremost software for remote access and administration, rather than for distant learning. There are more specialized tools for that purpose.
Let me know if you have any questions.