Hi medfordfarms-hot,
Welcome to Community! QuickBooks Online automatically updates your transactions, so your accounts remain balance and aligned. Receiving a notification that the multicurrency feature needs to be activated, is concerning. For this reason, I feel the best course of action is to contact our Customer Care team at 1-855-253-1536 from Monday to Friday between the hours of 9 AM and 8 PM EST. With your consent, they'll connect with you virtually and ensure you're able to connect your account as soon as possible!
If you have any other questions, feel free to reach back out. we would be glad to assist!