For buyers contracting authority
Reach for 48781000 when the deliverable is a systems-administration software product with its licence, not the people or services around it. The clearest decision is product versus service: a packaged IDM, service-desk, MDM or virtualisation tool with its licences lands here, while a contract that mostly buys integration or operation hours fits a 72-series services code better. Where a deal bundles the licence with implementation, set the primary CPV code by what dominates the statement of work.
The boundaries inside the parent family are the second thing to get right. Storage management software (48782000) is the pick when the job is administering disk, backup and capacity rather than the wider system. Content management software (48783000) covers documents and records, a different job from managing servers, identities and devices. Reserve 48781000 for the general control layer.
One more line worth flagging: identity and access tooling shows up often under this code, but a contract framed primarily around protecting data belongs with security software (48732000). If the requirement is administering access as part of running the estate, this code fits; if it is data protection as such, that one does.