To use the desktop version of Microsoft Office 365, you need a Microsoft account. With a Microsoft account, you have access to Microsoft application settings on the Account page and in the Word/Excel/PowerPoint/Outlook Options dialog box.
Microsoft applications such as PowerPoint, Word, and Excel use the same approach to set up and fill with colors, gradients, pictures, textures, and patterns for various graphic objects and text. Microsoft uses the theme color of each element as a placeholder rather than a fixed color. Thus, it is easy to change colors by switching to a different color theme - a set of colors assigned to preset positions.
In the beginning, in 2019, it seemed that Microsoft 365 would bother people with unnecessary checks and broken privacy. The tools surveil activity, communication, and the shares people do inside the team.