“The guy who knows about computers is the last person you want to have creating documentation for people who don’t understand computers.”
Adam Osbourne was right. Although we do understand computers (a fair bit), we also understand people (perhaps a bit less) so we’re good at translating. We can document your network for two different targets, either management, or IT.
For management, the documentation is a broad overview of your network. We’ll get to understand how your systems work, then diagrammatically expose it to you. Once you can see what it does, what connects to what and why you have it, it becomes far easier to understand. Once you’ve understood it, the management becomes far easier.
We get it, documentation isn’t fun, but it is necessary. Perhaps you have someone who looks after your IT, but also does other stuff. Perhaps you’ve outsourced your IT, but would like to retain control. In that case, you’ll require some more detailed documents, including how to get at your data and the passwords too. Look after this document, it’ll contain the keys to the kingdom and may form part of your disaster recovery plan.