I was still technically part of a research group after I'd finished grad school. The primary grant that I had worked under had a few stipulations, one of which was that the research group would present the findings of the work at x number of national/international conferences. The grant-giving organization had money set aside specifically for the conference attendance, and to make a long story short, I was the only one available to give the presentation.
I had just started a new job. Conference attendance wouldn't be a problem, right? After all, my travel and conference costs were entirely covered. Plus, as a newly-minted employee, I would be representing my new firm as a technical expert at big conference (related to that industry).
Not so much. New employer was fixated on the three days of admin/non-billable work that they'd need to pay me to fly out and give the presentation, so I ended up promising that I would squash three days of overtime into two weeks to avoid any extra admin charges.
I was wiped out by that overtime, plus the presentation prep time (also not allowed to be charged to the firm), and so I didn't do any actual conference networking to support my new employer.
I thought that the firm was outrageously short-sighted for not wanting to take advantage of a (mostly) free conference. I eventually figured out the office politics around having a brand-new employee jet off to a fancy conference (even though it was my research), and considered myself lucky to be allowed to go.
Now if I have a conference I'd like to attend, I make sure to have a business case for going and not just argue that I can give a cool presentation. I do miss grad school in that respect - as a grad student, I'd be able to take a free conference in a heartbeat, and not worry about more complicated financial/business development considerations.