Building custom solutions that extend, automate, and integrate Microsoft 365 apps.
Hi @Filipe DELOUREIRO
This tag (openspecs-office) is dedicated to supporting issues related to open specifications. You can find open specifications at https://learn.microsoft.com/en-us/openspecs/
Your inquiry is not related to open specifications. I am removing tag openspecs-office and adding tag office-addins-dev for a better chance of getting an answer.
Also you may want to check out the following resources:
https://github.com/OfficeDev/Open-XML-SDK/issues
https://stackoverflow.com/questions/tagged/openxml-sdk
Regards,
Obaid Farooqi - MSFT