Unable to connect Confluence to Google "This app is blocked"

[Thierry Berset]

I am unable to connect Confluence with a Google account.

The use case:

• I insert, on a Confluence page or in a Database, a link to a file stored in Google Drive
• Smart link appears, with the Connect to Google button
• When attempting to connect to the Google account, an error appears:
  This app is blocked. This app tried to access sensitive info in your Google Account. To keep your account safe, Google blocked this access.

This has worked fine earlier in 2025 from a different Atlassian organization.

I have found various Q&As about similar issues and tried the following:

• Delete all Cookies
• Start from a private browser
• Try from a different device where none of the accounts was ever used
• Start from a new user in Confluence that was never connected to any Google account
• Try connecting to a different Google account (none is working)
  • Private Gmail
  • Google Workspace
  • Google Workspace that is connected to a different Atlassian organization and working there
• Change to more secure login (anyway using Passkeys for all users)

I suspect that this could have something to do with Google's changed policy on connecting less secure third apps. But Confluence is supposed to connect based on OAuth 2.0.

I have tried third party apps from the marketplace and they seem to work. However, with some disadvantages, besides the cost.

The functionality that gets completely lost when using apps from the marketplace are Smart links in Databases, which I really started to like.

I am really lost at this moment and welcome any kind of support.

[Trudy Claspill]

Hello @Thierry Berset 

Welcome to the Atlassian community.

Are you trying to connect to a Google workspace that you administer? If not, contact the administrators of the Google workspace. Perhaps they made a change to block the access as per:

https://support.google.com/a/answer/7281227?hl=en

[Thierry Berset]

Thanks for the quick reply and for pointing directly to the Google support document.

I do have admin permissions in the Google workspace and found the following:

First check under: API controls > App access control > Configured apps - View details

Confluence App is configured for the org, with the following OAuth scope for specific Google data:

• Associate you with your personal info on Google
  openid
• See your primary Google Account email address
  https://www.googleapis.com/auth/userinfo.email
• See your personal info, including any personal info you've made publicly available
  https://www.googleapis.com/auth/userinfo.profile
• See, edit, create and delete all of your Google Drive files
  https://www.googleapis.com/auth/drive

I couldn't find a documentation on the OAuth scopes required by Confluence and instead copied them from the third party App that successfully accesses files in Google Drive.

I could set the App to "Trusted", but I would avoid for permanent operation if possible.

To that point, both Confluence and the third party app are identical.

Second check: Select the App from API controls > App access control

Confluence

• Google sign-in: 0 of 3 scopes granted by users
• Drive: does not appear

Third party app

• Google sign-in: 0 of 3 scopes granted by users
• Drive: 1 of 1 scope granted by users

Third check: My Google account

I am running all trials with my own admin account

Confluence

Does not appear in Third party apps and services

Does not appear in "Recent security activity"

Third-party app

Appears in third-party apps and services

• Drive: granted access
• Google sign-in does not appear

Appears in "Recent security activity"

I have even temporarily allowed "Less secure app access"

Therefore still lost.

It looks to me as if the attempt of Confluence to connect gets blocked right-away, without even leaving a trace.

[Samuel Frederick]

Also experiencing this on a newer Google Workspace org. Steps I have tried:

• Private browsing window
• Tried personal and work Google account
• Clear all history/cache/browsing data
• Confirmed with Google Workspace Admin that no 3P apps are blocked