You are the Microsoft 365 administrator for a company. Users in the IT department must receive new Office 365 preview features before the features are deployed to other users in the company. You need

Manually instructing users to update Office ProPlus does not control which release channel or preview features they receive, as the release track is governed by the admin center settings, not manual updates.

Setting the update preference to 'Targeted release for selected users' in the Microsoft 365 organizational profile allows administrators to designate specific users (the IT department) to receive new features before they roll out to the rest of the organization. This is the correct release track for a subset of users rather than the entire organization, and it does not affect other users who remain on Standard release.

Uninstalling and reinstalling Office ProPlus does not change the release channel assigned to those users; the release track is determined by the Microsoft 365 admin center organizational profile settings, not the local installation state.

Setting the update preference to Standard release would keep users on the general availability track, meaning they would not receive preview features early - this is the opposite of the desired outcome.