Symptoms
You perform an upgrade for a search service application in Microsoft SharePoint Online by using the Restore-SPEnterpriseSearchServiceApplication PowerShell command. However, the Restore-SPEnterpriseSearchServiceApplication PowerShell command does not create a partitioned search service application. In this instance, the search function does not work in SharePoint Online after the upgrade.
Resolution
To resolve this issue, apply the following hotfix packages:
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2276336 Description of the SharePoint Server 2010 hotfix package (osrchwfe-x-none.msp): August 31, 2010
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2266423 Description of the SharePoint Foundation 2010 hotfix package (Sts-x-none.msp): August 31, 2010
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
