Wednesday, July 6, 2011


I was using ILM (Identity Lifecycle Manager) to synchronize users cross forest to prepare for cross-forest mailbox moves using the sample code provided by Microsoft. Please see:

I was synchronizing over 5000 users to the new forest. Synchronization was failing with stopped-error-limit.

I found out that MIIS / ILM and FIM only allow up to 5000 objects by default. You can change this with a DWORD in the registry which you create under HKLM\SYSTEM\CurrentControlSet\miisserver\Parameters. This is documented by Microsoft on KB2387673

I set my limit to 10,000 which resolved the problem.

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