Outlook cannot synchronize subscribed folders in Gmail

Last reviewed on July 15, 2014   —  7 comments

On July 15, 2014, Google turned off Basic Authentication for all users and now requires all mail clients to use oAuth 2.0. Outlook and other desktop email clients do not currently support entering the pin codes required by oAuth 2.0 and must use special app passwords instead.

With Basic Authentication turned off, users who are not not using two-step verification will be unable to connect to Gmail servers using Outlook, Thunderbird, and other email clients.

You may receive the following message when Outlook attempts to log into your account:

imap error message

An email is generated when an email clients attempts to log on and is blocked.

You may receive the following send and receive error message:

Task 'Synchronizing subscribed folders for alias@gmail.com.' reported error (0x800CCC0E) : 'Outlook cannot synchronize subscribed folders for alias@gmail.com. Error: Cannot connect to the server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

If you are using two-step verification, you do not need to enable basic authentication; accounts with two-step enabled require an application-specific password for access using applications, such as Outlook, that do not ask for the pin code.

You have two choices: enable two step verification and use app passwords in clients that don’t support pin codes or turn basic auth back on. Two step verification is more secure and is highly recommended.

To turn Basic Authentication back on, go to Gmail account settings and choose Allow less secure apps.

Change gmail security settings

If you aren't using two-step verification, you can enable it in Settings. You'll need to create an app password to use instead of your normal Gmail password.

Enable two step verification video tutorial

About Diane Poremsky

Diane Poremsky
A Microsoft Outlook Most Valuable Professional (MVP) since 1999, Diane is the author of several books, including Outlook 2013 Absolute Beginners Book. She also created video training CDs and online training classes for Microsoft Outlook. You can find her helping people online in Outlook Forums as well as in the Microsoft Answers and TechNet forums.

Please post long or more complicated questions at Outlook forums by Slipstick.com.

7 responses to “Outlook cannot synchronize subscribed folders in Gmail”

  1. Shahzad

    Diane, this was very helpful. Its all done with your help with video. thank you.

  2. JC

    Thank you!! Finally a solution.

  3. satish

    Task 'Synchronizing subscribed folders for satish@texaras.com.' reported error (0x800CCC0F) : 'Outlook cannot synchronize subscribed folders for satish@texaras.com. Error: The TCP/IP connection was unexpectedly terminated by the server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

    1. Diane Poremsky

      Are you using an antivirus addin in Outlook? Do you have two factor authentication enabled on the account?

    2. randyj

      I have the same problem as satish, No AV addin in Outlook, and Yes for 2 setup authentication. I've been using it for over 2 years, as well as the App Password for Outlook 2013. It stopped working in October and I've reconfigured Outlook multiple times and recreated the App password multiple times as well.

    3. Diane Poremsky

      What port settings are you using?

  4. Luke Anderson

    Hey Diane,

    Just wanted to say that your post helped me to immediately get to the bottom of the strange symptoms that had been appearing in my Outlook these last few days.

    Like you say a simple case of enabling two-step auth with my phone and then clicking through to generate an "App Password" for "Windows PC".

    After changing the password in my Outlook Account Settings to the new App Password generated, Outlook sailed right through and downloaded all the queued mail.

    All the very best for now,

    Luke Anderson.

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