We grappled with this to some extent when we migrated to Workfront, as well. There was pushback from some stakeholders because our old project numbering scheme carried additional information about the project, rather than simply acting as a unique identifier. Before the transition, we spec'd out which information was needed (e.g., Portfolio, Project Type, Line of Business, etc.) and captured those in separate project-level custom fields in Workfront. For any situation that required a project to display the "old-style" project number, we could mimic it through reporting by converting those custom fields into the appropriate number codes. (The old-style numbers were mostly used by the executives at a high level, so handling it through reporting was sufficient for our needs.) ~Eric Eric Manning Language Line Translation Solutions
