To exclude a record(s) completely remove from Match and Merge process, regardless of any source system, using Informatica MDM.
Step 1: Add a not nuable column is BO as EXCLUDE_FROM_MATCH, with type integer and a default value 0.
Step 2: Set the value to 1 for those records that you want to exclude from Match.
Step 3: Generate Match Tokens and Execute the Match job.
Step 4: Verify the data using Data Manager.