The IFS Data Migration Excel Add-in manifest can be uploaded fine in the Excel web client, but the option to load it doesn't appear to work in the Excel desktop application.

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Answer

This has been tied to which Excel desktop version is in use — the modern Microsoft 365 desktop Excel client can load a manually shared add-in manifest through Trust Center's Trusted Add-in Catalogs setting (pointing it at a shared network folder containing the generated manifest file), while older perpetual desktop versions (like Excel 2016/2019) have been reported not to work with this approach at all; if the desktop add-in doesn't load, first confirm which Excel desktop edition is actually installed before troubleshooting the catalog/manifest setup further.

Documentation-based answer. Confirm the product and release before applying it. This answer has not been verified in an IFS environment.

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