Enterprise Meeting Scheduling for Microsoft 365
Coordinate Microsoft 365 teams without the email tennis
Your organization uses Microsoft 365 and Outlook. WhenToMeet integrates with your enterprise calendars to schedule cross-functional meetings, coordinate with clients, and eliminate scheduling back-and-forth—all while respecting your security and compliance requirements.
The Challenge
- ✕Outlook's 'Scheduling Assistant' only works inside your organization, not with external clients or partners
- ✕Finding meeting times across departments means checking multiple people's calendars manually
- ✕Email chains asking 'does Thursday at 2pm work?' waste time for enterprise teams
- ✕Coordinating with clients using different calendar systems (Google, Apple) is fragmented
- ✕Microsoft 365 admin restrictions prevent sharing calendar details with external collaborators
How WhenToMeet Helps
Outlook Calendar Integration
Connect your Microsoft 365 Outlook calendar to show real enterprise availability. WhenToMeet reads your busy/free status across Exchange Online and prevents double-bookings automatically.
Cross-Organizational Scheduling
Schedule meetings with people outside your Microsoft 365 tenant—clients, partners, contractors—without sharing internal calendar details or fighting with permission settings.
Enterprise Group Coordination
Find times when your product team, sales team, and executives are all available. See group availability at a glance instead of checking Outlook calendars one by one.
Compliance-Friendly
WhenToMeet only accesses busy/free status, never event details or confidential meeting information. Your enterprise data stays in Microsoft 365 where it belongs.
Works With Any Calendar System
Coordinate meetings between Microsoft 365 users, Google Calendar users, and people with no calendar system at all—all in one scheduling poll.
Key Features
Microsoft 365 Calendar Sync
Connect your Outlook calendar (Exchange Online) via Microsoft's official Graph API. Two-way sync ensures availability is accurate and scheduled meetings appear in Outlook automatically.
Real-Time Conflict Detection
As you propose meeting times, WhenToMeet checks your Microsoft 365 calendar and highlights conflicts with existing Outlook events, team meetings, and blocked time.
Multi-Tenant Support
Schedule meetings across Microsoft 365 organizations. Coordinate with clients in different Azure AD tenants without admin permissions or complex delegate access.
Enterprise Time Zone Handling
Coordinate across global offices in different time zones. WhenToMeet converts times automatically so everyone sees meetings in their local Outlook timezone.
Outlook Notifications
Scheduled meetings sync to Outlook with standard Microsoft 365 notifications. Participants get reminders via Outlook desktop, mobile, and web apps.
Get Started in 3 Steps
Connect Microsoft 365
Sign in with your Microsoft 365 work account. WhenToMeet requests read-only access to your Outlook calendar availability. Event details remain private and stay in Exchange Online.
Create enterprise meeting poll
Propose possible meeting times for your team. WhenToMeet checks your Outlook calendar and warns about conflicts with existing enterprise meetings. Share the poll link with internal teams or external clients.
Finalize and sync to Outlook
Participants vote on availability (internal users can connect their Microsoft 365 calendars too). Pick the optimal time and the meeting automatically adds to everyone's Outlook calendar.
Microsoft 365 Scheduling Best Practices
- ✓Enable Microsoft 365 SSO for your organization to streamline calendar connections for internal team members
- ✓Use Outlook 'working hours' and 'time zone' settings—WhenToMeet respects these preferences when suggesting meeting times
- ✓For cross-functional meetings, create polls at least 2-3 days in advance to work around busy enterprise calendars
- ✓Set up separate booking pages for different meeting types (client calls, internal reviews) with appropriate calendar connections
- ✓Encourage external clients to connect their calendars too—WhenToMeet supports Google, Microsoft 365, and CalDAV simultaneously
- ✓For global teams, verify proposed times appear correctly across time zones before sharing polls with international colleagues
Frequently Asked Questions
How does WhenToMeet integrate with Microsoft 365 and Outlook?+−
WhenToMeet uses Microsoft Graph API to connect with your Exchange Online calendar. You sign in with your Microsoft 365 account and grant read-only access to see busy/free availability. Scheduled meetings sync back to Outlook automatically.
Can I schedule meetings with people outside my Microsoft 365 organization?+−
Yes! This is where WhenToMeet shines. Schedule meetings with clients using Google Calendar, contractors using Apple Calendar, or anyone with no calendar system. Everyone votes on the same poll regardless of their calendar platform.
Do participants need Microsoft 365 accounts to join meetings?+−
No. Participants can vote on meeting times without any Microsoft account. However, if internal team members connect their Microsoft 365 calendars, they'll see their Outlook schedule while voting for better time selection.
What calendar permissions does WhenToMeet need?+−
WhenToMeet requests 'Calendars.Read' to see your busy/free availability and 'Calendars.ReadWrite' to add scheduled events to your Outlook calendar. We never access event details, attachments, or other mailbox data.
Is this secure for enterprise use?+−
Yes. WhenToMeet uses OAuth 2.0 via Microsoft's official Graph API. Only busy/free status is accessed, never confidential event details. Your enterprise calendar data stays in Exchange Online. We're SOC 2 compliant and support Microsoft 365 security best practices.
Does this work with on-premises Exchange Server?+−
WhenToMeet integrates with Microsoft 365 (Exchange Online) via Graph API. For on-premises Exchange, you can use the generic CalDAV integration if your Exchange server supports it, though features may be limited compared to cloud integration.
Can I schedule Teams meetings from WhenToMeet?+−
Currently, WhenToMeet syncs events to Outlook calendars. You can manually add Teams meeting links to the event description. Native Teams meeting creation is planned for a future release.
How does this compare to Outlook's Scheduling Assistant?+−
Outlook Scheduling Assistant works great inside your organization but can't coordinate with external clients or non-Microsoft calendars. WhenToMeet combines Microsoft 365 integration with support for any calendar system, making it ideal for client meetings and cross-organization coordination.