Does Jarvis support Outlook / Office 365, or only Gmail?

Outlook / Microsoft 365 is fully supported through Microsoft Graph. In Settings > Email Monitoring, you'll see both Gmail and Outlook as provider options. The UX is identical after connection, the difference is the OAuth flow goes through Microsoft instead of Google.

One small note: label-based filtering works slightly differently. Gmail uses labels, Outlook uses folders / categories. If you have a 'Support' folder, Jarvis will monitor new messages arriving there.