Channels 'not currently available' on Teams plan despite admin enablement

Same issue as #36503 — channels admin-enabled but "not currently available"

Environment:

• Claude Code v2.1.81, macOS (darwin)
• Teams plan, org: Brandlight
• Auth: Claude Team Account (OAuth, not API key/Console)
• Terminal: Warp

What I did:

1. Enabled Channels in admin UI at claude.ai → Admin Settings → Claude Code
2. Installed telegram plugin: /plugin install telegram@claude-plugins-official
3. Ran: claude --channels plugin:telegram@claude-plugins-official

What happened:

--channels ignored (plugin:telegram@claude-plugins-official)
Channels are not currently available

Diagnostic findings:

• No managed-settings*.json files exist in ~/.claude/ — the server never delivers them
• Local settings.json has no channelsEnabled key (and setting it locally has no effect per docs)
• Tested with and without a local API proxy (ANTHROPIC_BASE_URL) — same result
• claude auth status --text confirms Claude Team Account login

Question: Is Channels currently gated to Enterprise plans only, or should it work on Teams? The admin UI exposes the toggle but the client never receives the managed setting.