Error message:
The total items in a single folder exceed the 5,000-maximum threshold for SharePoint and OneDrive for Business migrations.
This error may also appear as "The requested operation is prohibited because it exceeds the list display threshold applied by the administrator."
Note: We have removed this limitation. If you are still running into this error, please contact our Support team. See How do I get support for your products? for more information.
Error source
On-Premises SharePoint, SharePoint Online, OneDrive for Business, and MigrationWiz
Cause of error
Due to SharePoint and OneDrive for Business threshold limits, MigrationWiz cannot migrate a document library that contains a folder with more than 5,000 items (files and folders).
For more information: Read the Manage large lists and libraries in SharePoint article from Microsoft.
Resolution
Use the UseAsynchronousMetadataRead=1 Advanced Support Option to circumvent this error. This option will change the way we index files and folders.