Lumman makes connectors. Add one to Claude, sign in where your mail and calendars already live, and ask. Each starts free and is billed on its own.

2 connectors

Mail

1

Multi MailEvery mailbox in one connectorOutlook, Hotmail, Microsoft 365, iCloud, Fastmail
Free, with a plan at $5 a month or $50 a year (£5 or £50 in the UK, €5 or €50 in the EU, VAT included).

Calendar

1

Multi CalendarEvery calendar in one connectorOutlook.com, Microsoft 365, Google
Free, with a plan at $5 a month or $50 a year (£5 or £50 in the UK, €5 or €50 in the EU, VAT included).