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Connect Microsoft 365

Outlook, Office 365, and Exchange Online

What's Included

This guide covers all Microsoft calendar services:

Outlook.com - Personal Microsoft accounts (@outlook.com, @hotmail.com, @live.com)
Microsoft 365 - Work or school accounts
Office 365 - Business subscriptions
Exchange Online - Enterprise email and calendars

Step-by-Step Guide

Go to Calendar Connections

From your SyncMyDay dashboard, navigate to Calendars in the main menu, or go directly to the Calendar Connections page.

Calendar Connections page with provider options

Navigation bar showing the Calendars option

Click "Connect Microsoft 365"

Find and click the Microsoft 365 button with the Microsoft logo.

Microsoft 365 button on Calendar Connections page

Click the purple "Microsoft 365" button to start connecting

Sign in with Microsoft

You'll be redirected to Microsoft's secure sign-in page. Enter your Microsoft email address:

Personal: @outlook.com, @hotmail.com, @live.com
Work/School: Your organization's email (e.g., you@company.com)

Work/School Account?

Your organization may need to approve SyncMyDay. Contact your IT administrator if you see an approval request message.

Enter your Microsoft email address

Enter Your Password

After entering your email, you'll be prompted for your password. Enter your Microsoft account password.

Your password is safe

You're entering your password directly on Microsoft's website. SyncMyDay never sees or stores your password.

If you have multi-factor authentication (MFA) enabled, you'll need to approve the sign-in on your phone or authenticator app.

Grant Permissions

Microsoft will show a permissions screen asking if you want to let SyncMyDay access your calendar. Click Accept to continue.

What permissions does SyncMyDay need?

Read your calendars: To detect when you have events scheduled
Create and modify calendar events: To create blocker events
Delete calendar events: To remove blocker events when needed
Maintain access to data: For continuous synchronization

Privacy First

We only read event timing (start/end). We never access event titles, descriptions, locations, or attendee information.

Grant SyncMyDay permission to access your calendar

Select Calendars to Sync

After granting permissions, you'll return to SyncMyDay where you can select which Microsoft calendars you want to use for syncing.

Most accounts will have at least:

Calendar - Your main calendar
Birthdays - Contact birthdays (you can skip this)

You may also see:

Shared team calendars
Resource calendars (meeting rooms, equipment)
Calendars shared with you by colleagues

Calendar selection dialog from Microsoft account

Select which calendars you want to synchronize

Connection Complete!

Your Microsoft 365 calendar is now connected and ready to use. You'll see it in your Calendar Connections list with an "Active" status.

✅ You're All Set!

Real-time synchronization is enabled via webhooks
Changes to your calendar are detected within seconds
Ready to create sync rules and start syncing!

Connected calendars list with Microsoft 365 showing Active status

Your Microsoft 365 calendar is successfully connected and active

Common Issues

"Your organization needs to approve this app"

Why this happens: Your IT department has restricted which apps can access company data.

Solution:

Contact your IT administrator or help desk
Ask them to approve "SyncMyDay" in the Microsoft 365 admin center
Or request an exception for your account

This is common in larger organizations and is a security best practice.

Connection shows "Error" status

Common causes:

Your password was changed
Multi-factor authentication settings changed
Organization revoked access

Solution: Click the "Refresh" button to re-authenticate, or disconnect and reconnect the calendar.

Can't see a shared calendar

Shared calendars should appear if they're added to your Outlook. If missing:

Make sure the calendar is visible in Outlook web or app
Disconnect and reconnect your Microsoft account
Ensure you have at least "Can view all details" permission

Next Steps

Connect Another Calendar

Connect a personal calendar (Google, Apple) to sync with your work calendar.

Create a Sync Rule

Set up your first synchronization between calendars.

Microsoft Graph API

SyncMyDay uses the Microsoft Graph API with these permissions:

Calendars.ReadWrite - Read and write calendar events
offline_access - Maintain access when user is offline

OAuth 2.0 Authentication

We use the standard OAuth 2.0 authorization code flow:

Supports both personal Microsoft accounts and Azure AD accounts
Tokens are refreshed automatically every 60 minutes
Refresh tokens are valid for 90 days (automatically renewed)

Real-Time Synchronization

Microsoft Graph change notifications (webhooks) enable instant sync:

Subscriptions are created for each connected calendar
Notifications are received within 2-3 minutes of changes
Subscriptions are renewed every 3 days automatically
Fallback polling occurs every 15 minutes if webhooks fail

Enterprise Admin Consent

IT administrators can pre-approve SyncMyDay for all users:

Go to Azure AD Portal → Enterprise Applications
Search for "SyncMyDay" or add via App ID
Grant admin consent for the organization
Users can then connect without approval prompts

API Throttling

Microsoft Graph has the following limits:

Per-app: 10,000 requests per 10 minutes
Per-user: 2,000 requests per second

SyncMyDay's webhook-based architecture minimizes API calls and stays well within limits.

Data Residency

Your calendar data remains in Microsoft's data centers. SyncMyDay only stores:

Calendar IDs and names
Event start/end times (no titles or descriptions)
Encrypted OAuth tokens