“Missing-Partition-for-run-step” error when starting first Import job in Microsoft Azure AD Sync

Posted on by rkmigblog

After installing the latest Version of Azure AD Sync we received the error “missing-Partition-for-run-step” in the Operation pane of the Synchronization Service Manager when trying to start the Full Import as very first step in our Run Profile.

The error only shows up when both is true:

  • The AD Forest as source of the Synchronization is a multi-Domain Forest
  • You configured the Azure AD sync to synchronize not all Domains of the Forest

By default the Azure AD Installation procedure creates a default run profile that includes all partition (domains) for the Import, while we filtered out the root domain in the Connector configuration.
To resolve the problem you need to clean up the Run Profile created by the Azure AD Sync wizard automatically. From Connectors pane select “Configure Run Profiles” and delete the run steps that include the unwanted “domains”. After the cleanup, you will successfully run the Import job.