Add Grant Access Capability to Sharing Interface for all UIs
Allow users to grant access to a file/folder, rather than just sharing links, from all OneDrive/SharePoint UIs (web, desktop, and mobile). Right now, mobile and desktop only let you create/copy sharing links. However, this isn't useful if you later need a link that will for sure work for everyone with access (whether view or edit). The "people with existing access" link option works great for users who have been granted access, but isn't helpful when a bunch of people only have access only through specific sharing links.