Microsoft SharePoint iOS app gets @ mentions in latest update version 4.5.0. Allows users to be notified when someone mentions them by name with an @ mention, and also enabled file renaming.

The full release notes:

  • New: @mention in comments and receive notifications when others @mention you
  • New: From within a document library you can now rename files, delete files, and create folders
  • Fixed: Support for Microsoft Stream web parts