Entra Connect 2.6.84.0 displays error when trying to configure containers

The exception shown is a missing localized resource for ContainerPickerControl. Because the Entra Connect wizard can enumerate OUs with the same AD credentials, directory connectivity and account permissions are demonstrated. That points to a UI or resource defect in Synchronization Service Manager 2.6.84.0, possibly locale-specific, rather than failed authentication. Use the supported wizard: Configure, Customize synchronization options, Domain and OU filtering; make the selection and finish. Avoid copying DLLs or manually editing connector properties because those changes may be overwritten. Confirm synchronization is healthy. Check the Windows display language and whether a newer Microsoft-published Entra Connect build is available; if so, follow the supported upgrade path. If 2.6.84.0 is current, reproduce once with English display language if practical, then open a Microsoft support case with the screenshot, culture, build, and connector logs. Continue using the wizard for OU filtering while the separate container picker is broken