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114114For other dialog messages, see [Troubleshoot federated cloud access](/docs/claude-tag/admins/federated-access/troubleshooting).
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116If Claude reports HTTP 403 with a reason that starts with [`request blocked: this credential only works in channel sessions, not personal ones`](/docs/claude-tag/admins/federated-access/troubleshooting#request-blocked-this-credential-only-works-in-channel-sessions-not-personal-ones), the request came from a personal session, such as a direct message with `@Claude`. A personal session runs under a person's own account. [Federated connections](/docs/claude-tag/admins/federated-access/limits#where-federated-connections-work) work only in agent sessions, so test again from a new thread in a Slack channel under the [scope](/docs/claude-tag/admins/attach-to-scope#how-scopes-inherit) of the Access bundle that holds the connection.
116If Claude reports HTTP 403 with a reason that starts with [`request blocked: federated connections work only in agent sessions (such as a Slack channel), not in personal sessions (such as a direct message)`](/docs/claude-tag/admins/federated-access/troubleshooting#request-blocked-federated-connections-work-only-in-agent-sessions-such-as-a-slack-channel-not-in-personal-sessions-such-as-a-direct-message), the request came from a personal session, such as a direct message with `@Claude`. A personal session runs under a person's own account. [Federated connections](/docs/claude-tag/admins/federated-access/limits#where-federated-connections-work) work only in agent sessions, so test again from a new thread in a Slack channel under the [scope](/docs/claude-tag/admins/attach-to-scope#how-scopes-inherit) of the Access bundle that holds the connection.
117117
118118## Related resources
119119