In order to use your OneDrive/Sharepoint library and distribute your PowerPoint, Word and Excel content you must authenticate with a Microsoft account.
Go to the "Settings" tab:
Click on "Accounts" and the "New Account" button:
Add a name of this account (usually your email address, it will help you find it later) and select Microsoft.
Click "Next" :
After the redirection, choose the account you want to use.
Define access rights. It defines who will be able to use this account to add images or videos on the screens:
Click on "Save"
Your Microsoft account is now set up on DynamicScreen!