MeetingOS currently supports one connected calendar per account.
Workarounds
If your meetings are spread across multiple calendars, here are two options:
Share your secondary calendar into your primary calendar. Most calendar platforms support this:
Google: In Google Calendar settings, share the secondary calendar with your primary Google account
Microsoft: Delegate or share the secondary calendar to your primary account Once shared, all events will appear in your primary calendar — and therefore in MeetingOS
Request a second beta account. If you need completely separate workspaces (e.g., for work and personal use), contact us and we'll set up a second account with a different email address. Note that the two accounts won't share any data or context with each other.
Native multi-calendar support is something we're considering for future development.