Unable to add again Hotmail account to Auth App with error please try again later

Need help with setting up the Microsoft Authenticator app after uninstalling and reinstalling it on their Android device. Had been trying unsuccessfully for four days, encountering repeated prompts to try again the next day and issues with adding their Hotmail account to the app, which remained empty. The agent attempted various troubleshooting steps, including disabling and re-enabling two-step verification, guiding the customer through remote assistance via Quick Assist, and instructing on scanning QR codes and managing passwordless login settings. Unable to successfully add their account to the Authenticator app or complete recovery using backup data.