---
sourceDocument: Australia Telecommunications Service Operations Management
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/pt-BR/telecom-service-ops

 Release :

    - australia

ft:locale :

    - pt-BR

ft:publication_title :

    - Australia Telecommunications Service Operations Management

ft:clusterId :

    - tsom

bundleId :

    - tsom

workflow :

    - Customer and Industry


---

# Control CI attribute updates

# Control CI attribute updates using Reconciliation rules {#ariaid-title1}

* Versão de lançamento: Australia
* 
* Atualizado 12 de mar. de 2026
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 min. de leitura

To prevent specific attributes of a Configuration Item (CI) from being overwritten by Discovery or other data sources, use Reconciliation Rules. These rules define which data source is trusted to update a particular attribute
when multiple sources provide values.

## Antes de Iniciar

Role required: admin

## Por Que e Quando Desempenhar Esta Tarefa

Reconciliation Rules are processed by the Identification and Reconciliation Engine (IRE) and are essential for maintaining data integrity in the CMDB.  
Use Case: If you want to prevent Discovery from updating a set of attributes while allowing another source (like SCCM or manual entry) to update them, define a rule that excludes the Discovery source.  
Nota:  
Only one Reconciliation Rule should be active for a specific CI class and attribute combination to avoid conflicts.

## Procedimento

1. Navigate to AllCI Class Manager.
2. Select the target CI class (e.g., cmdb_ci_computer).
3. In the Reconciliation Rules tab, click New to create a rule.
4. Provide the rule name and select the Discovery source to apply the rule to.
5. Specify the attributes that this rule will govern.
6. Set the source precedence to allow only the selected sources to update the specified attributes.

## Resultado

Certain CI attributes will no longer be updated by untrusted or lower-priority data sources like Discovery. Only the sources defined in the rule (e.g., SCCM, manual updates) will be allowed to update those attributes.
**Tarefas relacionadas**   

* [Configure attribute value discrepancy in CMDB 360](https://servicenow-prod.fluidtopics.net/3tUL229ZCdQS11xxzb9TYQ "Configure attribute comparison settings in CMDB 360 to detect data inconsistencies across multiple discovery sources.")