Is your Microsoft Outlook showing Bigpond password prompts again and again? It can be happening when Microsoft Outlook is trying to authenticate with corrupted cached credentials, outdated legacy server pats and blocked standard login paths but there is nothing about to worry because this prompt can be stopped easily just by following steps that we mentioned below and you are able to use your Bigpond email account in Microsoft Outlook without any interruption.
Steps to stop Bigpond password prompts in Microsoft Outlook:
1. After security updates in Bigpond you can’t login in email clients with your account password you have to enter app specific password.
2. To generate app specific passwords, open the browser and login to your account.
3. Open settings then click on accounts and select generate password, name it Outlook.
4. Remove your old password from Outlook and enter the new app specific password there.
5. If you enabled the always prompt setting in Outlook then disable it first because it shows you the constant pop-ups.
6. Open Outlook then go to account settings and search for the security tab there you find the option to disable the always prompt for logon credentials option.
7. Also ensure that you are using the latest incoming and outgoing server details to avoid this issue.
After performing these steps that we mentioned above you can make sure to don’t see this Bigpond password prompt again in Microsoft Outlook but thing that you have to remember is using correct server settings for both incoming and outgoing, using correct login credentials and disable always prompt option from setting but if still having this prompt again then we suggest you to contact Bigpond customer support.

More Info: https://www.bigpondonlineservice.com/blog/change-bigpond-password-through-telstra-profile/