
For better analysis, we need more information.
Could you please share us with the error message screenshots of the failed installation or activation?
You may provide the configuration file (.xml), if there is any privacy information, such as MAK key, you need to delete it.
- If you have a volume license for excel 2021 LTSC instead of Office 2021 LTSC, the Product ID in .xml file should be
Excel2021Volume
.
Besides, please ensure the ODT tool is the latest one.
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