outlook blocked by google

If Google is blocking access to Outlook.com mail that is already set up as a connected Gmail/IMAP account, it is most likely related to Gmail IMAP or connection settings.

Try these steps:

1. Verify IMAP is enabled in Gmail
   1. Sign in to Gmail in a browser.
   2. Go to Settings (gear icon) > See all settings.
   3. Open the Forwarding and POP/IMAP tab.
   4. Under IMAP access, make sure Enable IMAP is selected.
   5. Select Save Changes.
2. Confirm the IMAP/SMTP settings used for the Gmail connection If Outlook.com is connecting to Gmail via IMAP/SMTP, verify the values match the following:
   • Incoming mail (IMAP) server: imap.gmail.com, SSL required, Port 993
   • Outgoing mail (SMTP) server: smtp.gmail.com, SSL required, TLS required if available
   • SMTP ports: 465 (SSL) or 587 (TLS/STARTTLS)
   • Username: full Gmail address
   • Password: current Gmail password (or app password if using that method)
3. Recreate or re‑authorize the Gmail connection
   • If the Gmail account was added as a connected account in Outlook.com and has stopped syncing, remove the connected account and add it again so that Google can prompt for and grant fresh consent to Microsoft.
   • During re‑add, complete the Google sign‑in and allow Microsoft access when prompted.

If the problem persists after IMAP is enabled and settings are correct, manage the connection from Outlook.com’s connected accounts page and re‑establish the link so Google can authorize Outlook again.

References:

• Fix problems connecting your Google account to the Microsoft Cloud
• Connected email accounts like Gmail and Yahoo not working in Outlook.com