Gemini Enterprise + Jira Cloud Integration

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[Question] Gemini Enterprise + Jira Cloud Integration: OAuth 2.0 Authentication Error and Required Permission Settings

Hello everyone,

I am trying to connect Google Gemini Enterprise with Jira Cloud, but I am stuck on an authentication error and cannot find a solution. I would greatly appreciate any help from those who have experience with this setup.

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■ What I want to achieve

I want to build a custom logic on Gemini Enterprise that runs automatically every 5 minutes (batch processing) to do the following:

1. Search for Jira tickets with the "Unresolved / To Do" status
2. Assign a specific person to each ticket based on my logic
3. Transition the assigned ticket to a specific status

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■ Current Configuration

I created an OAuth 2.0 (3LO) app in the Atlassian Developer Console with the following settings.

Callback URL: https://vertexaisearch.cloud.google.com/console/oauth/jira_oauth.html

Classic scopes:

• read:jira-work
• write:jira-work
• read:jira-user

Granular scopes:

• read:issue-details:jira
• read:issue:jira
• read:project:jira
• read:user:jira
• read:jql:jira
• read:group:jira
• write:issue:jira

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■ What is happening

• When I go to the Gemini Enterprise connector menu, select Jira, and turn the connection ON, a strikethrough / slash icon (like ⊘) appears next to Jira
• I checked videos online of others connecting Jira with Gemini, and this slash icon does not appear in those cases — so I believe it indicates the connection is not being established correctly
• When I attempt to authenticate, I get the error: "A problem occurred during authentication. Please try again."
• At one point, the Atlassian side also showed: "The app's callback URL is invalid"

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■ What I would like to know

1. What does the slash/strikethrough icon next to Jira in Gemini Enterprise mean, and how can it be resolved?
2. Is it correct to use both Classic and Granular scopes together, or should I stick to one?
3. What is the minimum correct scope configuration to achieve automatic assignee assignment and status transitions via Gemini?
4. Has anyone successfully connected Gemini Enterprise with Jira Cloud? If so, could you share your configuration?

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When I ask Google, they tell me to ask Atlassian. When I ask Atlassian, they tell me to ask Google. I am hoping someone in this community has hands-on experience with this combination.

Any help would be greatly appreciated. Thank you!