I worked for an MSP that merged with a copier company. Copiers got more and more capable, and so of course people wanted to use their "advanced" features, hence the merger with an IT company.

When they sold a copier, they would sell limited IT engagements. Things like handing information and help to customer IT, or if they lacked IT, limited help like placing it on the network, installing the drivers to use it as a printer, setting up scanning to network. This was done remotely by a level one technician, Joe this time.

Well, install day came, and after Joe helped out the customer claimed that some computers could print, some couldn't. And some computers couldn't access anything else on the network. They hired a local IT guy that threw Joe under the bus, and the customer yelled at my boss. As one of the level 2 techs, I was told to "fix what Joe fucked up" right in front of Joe. Shit boss, different story.

I travel out there, look at their problem, but was told I couldn't touch anything until their IT guy showed up. So I used the time to ask questions, and tour around since I had a hunch.

Local IT guy strides in 15 minutes late, smug as hell. I talk and lead him to the basement, following the signal strength of a weirdly named wifi signal, and get a solid full strength connection in front of a locked closet. I ask them to unlock it, and ask about the router I see on the shelf, and point out that I believe it's their issue.

Local IT guy installed a router as an access point, and did it so wrong that it was acting as a 2nd DHCP server on their network, handing out different addresses. In layman's, their computers had 2 bosses with differing orders. Therefore local IT guy broke it, and blamed Joe cause he didn't understand what he did.

I praised Joe from that day for being the first technician I knew capable of physically installing gear remotely. He was an excellent tech, and a good colleague.