presynchronize-upgrade.md

title	TOCTitle	ms:assetid	ms:mtpsurl	ms:contentKeyID	author	ms.date	mtps_version	f1_keywords
Presynchronize (upgrade)	Presynchronize (upgrade)	44585f2f-9b9e-4155-8288-a48e93ef0a82	https://technet.microsoft.com/library/Gg731786(v=AX.60)	35132617	tonyafehr	04/18/2014	v=AX.60	database data

Presynchronize (upgrade)

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Applies To: Microsoft Dynamics AX 2012 R3, Microsoft Dynamics AX 2012 R2, Microsoft Dynamics AX 2012 Feature Pack, Microsoft Dynamics AX 2012

When you perform the Presynchronize task in the target system, you use the Data upgrade cockpit (%1 -> %2) to run scripts that map the database schema on the source Microsoft Dynamics AX system to the database schema on the target system. This table-to-table and column-to-column mapping is new with Microsoft Dynamics AX 2012, and prepares the target database for synchronization. If like-to-like mapping fails and errors result, you can manually repair the mapping and rerun the script.

Indexing is disabled while the presynchronization scripts are running.

The presynchronization scripts that ship with Microsoft Dynamics AX 2012 are meant to serve as models for developers of new Microsoft Dynamics AX modules.

Prepare your database for synchronization as follows:

1. In the Data upgrade checklist, click Presynchronize. The Data upgrade cockpit (%1 -> %2) opens and lists the upgrade tasks to be completed.

2. Click Run. In the Upgrade job grid, an icon next to each job indicates the job’s status as the presynchronization scripts run.

3. Address any errors that occur and then rerun the scripts.