Connecting Personal Calendars

This page is for customers who will allow their users to integrate their Microsoft 365 calendar with Zoom Workplace, enabling users to see their Microsoft 365 scheduled events.

If the optional Bi-Directional Calendar Sync is enabled, users' Zoom Meetings will automatically synchronize between Zoom Workplace and Microsoft 365 environments.

Organizations not allowing for personal calendar connections can browse to Connecting Zoom Rooms and/or third-party conference rooms.

Configure Zoom web portal Calendar and Contact user consent settings

To configure your account to allow users to integrate their Microsoft 365 calendar with the Zoom Workplace app, perform the following steps:

1. As a Zoom Admin, sign into zoom.us.

2. Click the Account Management drop down and select Account Settings.

3. Navigate to the Mail & Calendar tab.

4. Click the Integrations tab to jump to the appropriate settings.

5. Click the toggle button next to Integrate third-party mail and calendar services then click Enable in the pop-up window.

6. For the Choose default calendar and contact services for users setting, select Office 365 and for the Authorize with: setting, select Graph API.

The option for “Exchange Web Services(EWS)” is not recommended. Microsoft has begun phasing out the EWS methods, which were previously available to connect Microsoft 365 data with Zoom services. Zoom considers these EWS methods to be unsupported legacy options.

1. Under the Who can set up the integration: setting, choose from the following option:

   1. Users can set up the integration by using OAuth

   2. Office 365 admin can set up the integration by using Application Permissions which will take you to your Microsoft 365 environment for further configuration.

Deciding whether OAuth or Application Permissions is best will vary based on your company’s goals and preferences.

The OAuth method, also called Delegated Permissions, offers flexibility in the permissions it grants, reflecting the selected permission scopes above the setting within the Zoom web portal. However, this setting can lead to un-synced calendar events, as the integration will expire and require re-authentication if the token is revoked or the user’s password changes.

Alternatively, the Application Permissions method does not require periodic re-authentication from users, but may not support the same levels of functionality. It also grants Zoom Workplace an initially greater level of access to your Microsoft 365 environment. By default, these scope permissions cannot be restricted upon approving the app; however, administrators can retroactively adjust the permissions scope of this app within Entra ID by following the steps in Revoking Entra ID Permissions section of this guide. If you want Zoom Workplace to retain access to calendar events but not mailboxes, you can revoke all permissions except Calendar.ReadWrite. For a complete list of permissions required, refer to the Validate the MGAPI Application Permissions method Application IDs and Scopes section.

(Optional) Configure calendaring settings

Zoom Workplace offers additional calendar integration configuration settings on the account and group levels for managing integration access, security, and ease of configuration. These additional configurations are not required, but can be helpful in new deployments.

Administrators can configure Zoom Workplace to prompt users to integrate their calendar when authenticating through SSO either the first time they authenticate, or prompt every time until the integration is complete.

Restrict calendar and contacts integration by domain

Administrators can restrict the Calendar and Contacts integration features to users with specified domains.

Bi-Directional Calendar Sync

With Bi-Directional Calendar Sync enabled, if a user schedules or updates a meeting from a Zoom client or the web, the Web Calendaring Service creates or updates the event on the user’s calendar through the calendar service provider’s API.

Zoom is gradually rolling out Bi-directional Sync 2.0. While generally available as of September 2025, Zoom plans to roll it out to all paid Zoom accounts by the end of October 2025. Accounts still on Bi-directional Sync 1.0 will continue to use the limited 30-day forward-only cache until they upgrade to Bi-directional Sync 2.0. The following table shows the difference between version 1.0 and 2.0 of calendar syncing.

Feature	Bi-Directional Sync 1.0	Bi-Directional Sync 2.0
Default Status	Optional (admin/user choice)	Recommended & default-on once calendar is integrated
Data Cached	30 days forward of Zoom meetings only	24 months total: 6 months back + 18 months forward, includes Zoom and Outlook events
Event Coverage	Zoom meetings only	All calendar events (Zoom + non-Zoom)
Retroactive Sync	Not supported	6 months of past events synced retroactively
Trigger Requirement	Sync required Outlook action (create/update)	Automatic sync without needing Outlook triggers
Performance	Limited to small event cache	Enhanced by larger cache + local performance improvements
Rollout	Available to all integrated accounts	Generally available, gradual rollout for all paid users

Bi-directional Sync is now recommended and enabled by default once a calendar integration is established with Microsoft 365. This feature helps ensure that both Zoom meetings and non-Zoom calendar events remain consistent between Zoom and Microsoft 365 as Sync 2.0 caches both types of event data. With Bi-directional Sync 2.0, Zoom caches a total of 24 months of events — six months of historical data and 18 months of future events. This expanded caching not only helps enhance reliability but also allows users to manage their calendar directly within the Zoom client without switching back to Outlook.

Admins can configure this feature on an account or user group level. Refer to our support documentation for more information.

Test the integration with a user account

Once completed, test the integration configuration from a non-admin Zoom and Microsoft 365 account to confirm the integration is working as expected.

1. Navigate to the user Profile page and locate the Contact and Calendar Integration at the bottom of the page.

2. Select the option to Configure Calendar and Contacts Service.

3. Select Office 365 and click Next.

4. Confirm the permissions you would like to grant access to.

5. Authenticate your identity with Microsoft 365.

6. Click Accept.

After completion, the user should be returned to their profile page with a successful calendar integration.