# Limits Worth Knowing

> Real constraints in the current build. Knowing them saves you misreading a screen.

Source: https://behavly.io/help-center/troubleshooting/known-limits · Behavly Help Center · Troubleshooting

These are real constraints, not caveats.

- **Visitor lists read a window, not everything**: Up to 200 identities per source per request, with per-person facets computed from that source's most recent 5,000 events in the selected range. Shorter ranges are complete.
- **Country is empty in local development**: It comes from edge request headers, which are absent when running locally.
- **Notification read state is per-browser**: It does not sync across devices.
- **Adaptive scheduling is not yet available**: The option appears in the Schedule step when Behavly is writing your copy, but cannot currently be selected.
- **Google and Microsoft OAuth are not offered**: Connect those mailboxes over IMAP/SMTP instead.

See also: https://behavly.io/help-center/campaigns/scheduling, https://behavly.io/help-center/settings/connect-a-mailbox