Use Standard Entity Identifiers

When creating entityMappings, use semantically strong, standard identifier fields as the mapped columnName. Avoid “legacy/weak” intermediary names like AccountCustomEntity (and avoid unnecessary wrapper columns like IPCustomEntity) when a direct standard field already exists.

Apply this consistently:

• Account entities: If you have a UPN, map FullName to the UPN-derived field (commonly UserPrincipalName) rather than a legacy *CustomEntity column.
• IP entities: Prefer mapping from the actual IP source field (e.g., SrcIpAddr) directly instead of creating an IPCustomEntity wrapper just to rename.
• If the platform expects split identifiers: follow the documented entity model (e.g., Name vs UPN suffix) instead of relying on a legacy “FullName” mapping.

Example (replace legacy mapping):

// Before (legacy/weak naming)
| extend AccountCustomEntity = UserPrincipalName
...
entityMappings:
  - entityType: Account
    fieldMappings:
      - identifier: FullName
        columnName: AccountCustomEntity

// After (standard identifier)
| extend UserPrincipalName = tostring(InitiatedBy.user.userPrincipalName)
...
entityMappings:
  - entityType: Account
    fieldMappings:
      - identifier: FullName
        columnName: UserPrincipalName

Example (avoid IP wrapper):

// Before
| extend IPCustomEntity = SrcIpAddr
...
entityMappings:
  - entityType: Ip
    fieldMappings:
      - identifier: Address
        columnName: IPCustomEntity

// After
...
entityMappings:
  - entityType: Ip
    fieldMappings:
      - identifier: Address
        columnName: SrcIpAddr