Technical Resources

API & Webhooks

• API
• Managing Attributes via the API
• Calendar Events Batch API
• Calendar Sync Webhooks

Technical Support

• SAML Certificate Update - October 2023
• Office365 Calendar Sync V2 Update - 2022
• Revoking & Reauthorizing Calendar Sync
• Accessing 12twenty From China
• Frequently Asked Questions (FAQs)

Release Notes

• 2025 Release Notes
• 2024 Software Release Notes
• 2023 Software Release Notes
• 2022 Software Release Notes
• 2021 Software Release Notes
• 2020 Software Release Notes
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