I'm surprised to find a university's web-site that wants me to stop using the English genitive with inanimates. Such as, for example, "university".
It's a serious gap in my education. I have never heard of this before.When referring to an attribute of an inanimate object, it is inappropriate to use the possessive endings. An inanimate object such as a chair or a window cannot own anything. The relationship must be indicated by using a prepositional phrase. Therefore, we speak (and write) not about the chair’s leg but about the leg of the chair.
The preposition “of” introduces a phrase that explains the relationship between the chair and the leg.