Choose the Office Mobile for iPhone app error you see for more information about it:
Cannot complete transaction
The message may appear when you tap on Buy Now or Restore Purchase from the Buy page in the Office Mobile for iPhone app.
This is usually caused by internet connection issues. You can tap the top left arrow on the Buy page to refresh it and tap Buy Now or Restore Purchase again. If the message continues to occur, check your iPhone for internet connection issues and try the solutions provided in this Apple support page or contact Apple support.
This is usually caused by internet connection issues. You can tap the top left arrow on the Buy page to refresh it and tap Buy Now or Restore Purchase again. If the message continues to occur, check your iPhone for internet connection issues and try the solutions provided in this Apple support page or contact Apple support.