Without going into all the details, I work for a very large company with a mix of onsite only and remote positions. I started in an in-office position then later switched to a different group that is all telecommute (and have switched groups a second time 2 1/2 years ago). Every year or two the company changes it's stance and either wants to drive down office space costs by getting people to work from home or they get a bug up their butt and want to make telecommuters go into an office. Any office. Fortunately (or unfortunately) there are no nearby offices any longer so I get a free pass from the mandatory work from an office requirement when they occasionally do that.
In my line of work (senior Unix/AIX system administrator for lack of a better description), the expectation is to hit the ground running. We don't hire jr or mid-level people for my group, we simply don't have time for hand-holding. When we get new people in my group, after they get their laptops, logins, etc. we give them a project and get them working. Every computer environment is different, so there will be questions on how we do things, but other than learning the environment, which groups are responsible for what tasks, who to contact for XYZ, etc. there is no training. Obviously there is a fair amount of administrative stuff to learn, how to connect to the VPN, how to access the servers, how to enter your time, how to use the ticketing system, how to put in vacation requests, etc. and that "training" just comes from co-workers.
