We do have an office library but each user has a local copy with an identical path "(C:\LocalLibrary\)" to reduce the chance of missing textures. The missing textures often occur when upgrading projects, especially from Revit 2022. For whatever reason, the Revit 2022+ path becomes lowercase while the path in Enscape seems to be case-sensitive. This tends to break the link for the Enscape material
IES profiles or other assets are placed in project-specific folders. Often on BIM360 or Onedrive