Data
Merge partners and items with a human review so two names stop being two companies.
Where to find it: Left menu → Data Management → Master Data Duplicates

Step 1
Left menu → Data Management → Master Data Duplicates. If the name is missing, your role does not include it — ask an admin in Users & Roles.
Step 2
Review suggested duplicates. Keep one, merge the other. Do not merge two real legal entities.
Step 3
Search should find one partner. Old documents should point at the kept id.
Yes. Master Data Duplicates is a signed-in workspace screen. This public page teaches the screen with a picture and a link to the feature video. It never shows another company’s data.
The left menu only shows screens your role may open. Ask a company admin to grant the matching permission, or to show you which role should own this step.
Mark as not duplicate. Forcing a merge is worse than two cards.