Attributive or Possessive noun: the Dell Company's staff. or the Dell Company staff? [duplicate]

In the following is it better to use a possessive noun with an apostrophe or an attributive noun without an apostrophe?

The following list details the assumptions that have been made in conjunction with the Dell Company’s staff.

Or

The following list details the assumptions that have been made in conjunction with the Dell Company staff.

Assume Company is the name of a company, such as Dell.

Some companies have a style guide that specifies that the company name should not have any such additions.

So if in doubt, you should use the form without the apostrophe.

This also remains correct in cases where the name is foreign, and possessive forms might be constructed in a different way.