This page will help you verify Edit Issue permissions. This permission is required for all issues in projects that were using the old Classic Connector in order for the Import Associations feature to function properly.
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The Edit Issues permissions can be verified by using the Permission Helper:
Type "."
In the dialogue box that appears, type "Permission helper".
Enter "Salesforce & JIRA Cloud Connector" as the User and "Edit Issues" as the Permission.
You should see something like this:
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