This is because Google has turned off Basic Authentication by default for all new accounts and accounts which haven’t synced within the last 30 days and only lets you authenticate via the OAuth 2.0 standard. To resolve this problem, enable Basic Authentication for your Gmail account. When configuring your Gmail account in Outlook (or other mail clients such as Thunderbird and Mail apps on (older) smartphones), you may run into continuous password prompts or sync errors. the calendar functions on Outlook, Microsoft Teams, and other Microsoft tools to allow. Gmail did not allow the Basic Authentication after July 15, 2014. Your Gmail account will no longer any new emails after this date. This is due to Google has increased its security measures to block access to Google accounts. Note If you are using Outlook 2016 for Mac or Outlook for Mac 2011, the prompt and error message may look different, but the method for resolving the issue is the same. Your IMAP server wants to alert you to the following: Please log in via your web browser:
When you try to add a new Gmail account in Microsoft Outlook using IMAP/POP3, you encounter the following symptoms:
