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Sync Issues Outlook 2010 (“Synchronization Log:” and “Modification Resolution”) with Exchange 2010 Mailbox


Moved my mailbox to Exchange 2010 Client Outlook 2010, Noticed that started seeing two kinds of Sync logs in “Sync Issues” folder: “Synchronization Log:”  and “Modification Resolution”.

It doesn’t happen if my Outlook is on ONLINE mode. It only happens in Outlook Cached Mode.

Here sometime BES server also generates these logs consistently. 

Stopping “Modification Resolution” logs. Modification Resolution log explains what Outlook did on a conflict on items.


To stop generating this log, create a registry entry as below with option 0.

Key: HKEY_CURRENT_USER\ Software\Microsoft\Office\14.0\Outlook\Options

DWORD: EnableConflictLogging


0 = Never save Modification Resolution logs

1 = Always save Modification Resolution logs

2 = Save Modification Resolution logs when a “critical conflict” occurs

Best practice is take whenever we are doing any changes on “Registry or ADSI” like regedit or adsiedit recommended to take Backup. 


MCTS | Exchange Server

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