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Scheduling meetings manually can quickly become frustrating, especially when you need to coordinate with clients, colleagues, or customers across different time zones. Calendly and Microsoft Outlook can work together to automate your scheduling, prevent double bookings, and keep your calendar updated.
In this guide, we’ll explain how to sync Calendly with Outlook, how the integration works, and what to do if your meetings are not syncing correctly.
What Does Calendly–Outlook Sync Do?
Connecting Calendly to Outlook allows Calendly to check your Outlook calendar when someone tries to book an appointment.
For example, if you already have a meeting scheduled in Outlook, Calendly can treat that period as unavailable. When someone books through Calendly, the new appointment can automatically be added to your Outlook calendar.
This helps you:
- Avoid double bookings
- Keep your availability accurate
- Automatically add Calendly appointments to Outlook
- Manage Calendly and Outlook meetings from one workflow
- Reduce the need for manual calendar updates
Calendly currently supports connecting Office 365/Outlook.com, Google Calendar, and Exchange, with the exact number of calendars depending on your plan.
How to Sync Calendly with Outlook
Step 1: Log in to Calendly
Open your Calendly account and sign in.
Once logged in, go to your Calendar settings. Calendly’s current interface provides the option to connect a calendar account from the calendar settings area.
Step 2: Connect Your Outlook Calendar
Select Connect calendar account and choose Outlook Calendar.
Depending on your Calendly interface, you may see options such as:
Settings → Calendar → Connect calendar account → Outlook Calendar
If you signed up for Calendly using an Office 365 or Outlook.com account, your Outlook calendar may already be connected.
Step 3: Sign in to Microsoft
Calendly will redirect you to Microsoft.
Enter your Microsoft account credentials and grant Calendly permission to access your calendar.
If you are using a company-managed Microsoft 365 account, your organization’s administrator may need to approve the Calendly application before the connection can be completed.
Step 4: Select Calendars to Check for Conflicts
After connecting Outlook, choose which calendars Calendly should monitor.
Calendly uses these calendars to determine when you are unavailable.
For example:
Outlook Calendar
- 10:00 AM – Client meeting
- 12:00 PM – Internal meeting
- 3:00 PM – Doctor appointment
Calendly can use these events to prevent someone from booking you during those times.
Calendly currently allows up to four Outlook sub-calendars to be selected for conflict checking.
Step 5: Choose Where Calendly Bookings Should Be Added
Next, select the Outlook calendar where you want your Calendly appointments to appear.
This is important because Calendly adds new scheduled meetings to the selected calendar rather than automatically adding them to every connected calendar.
For example, you could choose:
Outlook → My Calendar
Then every new Calendly booking will automatically appear there.
Step 6: Configure Your Sync Settings
Calendly provides additional synchronization settings.
Depending on your setup, you can configure options such as:
- Whether buffer periods are added to your Outlook calendar
- How Outlook event statuses affect your Calendly availability
- Whether deleting or declining a Calendly meeting in Outlook should cancel the meeting in Calendly
For example, Calendly can treat Busy, Tentative, Away/Out of Office, and Working Elsewhere events as unavailable, depending on your settings.
How to Check Whether the Sync Is Working
After connecting Outlook, create or receive a test appointment through your Calendly booking page.
Then check Outlook.
You should see the Calendly meeting added to the calendar you selected.
You can also create a test event directly in Outlook and check whether Calendly recognizes that time as unavailable.
This two-way test is useful because it verifies both:
- Outlook → Calendly: existing Outlook meetings block your availability.
- Calendly → Outlook: new Calendly bookings are added to Outlook.
Calendly also displays connected Outlook meetings within its Calendar page, although those connected-calendar meetings are view-only from Calendly.
Calendly Outlook Add-In vs. Outlook Calendar Connection
One common source of confusion is that Calendly has both an Outlook add-in and an Outlook calendar connection/plugin.
They serve different purposes.
Outlook Calendar Connection
This is what you need if your goal is to sync your Outlook calendar with Calendly.
It allows Calendly to:
- Check your Outlook availability
- Prevent double bookings
- Add scheduled Calendly meetings to Outlook
- Manage certain synchronization settings
Calendly Outlook Add-In
The Outlook add-in is different.
It puts Calendly directly inside Outlook so you can access Calendly while composing an email.
You can use it to:
- Share Calendly scheduling links
- Share available time slots
- Create one-off meetings
- Create meeting polls
- Access Calendly from the Outlook toolbar
The add-in does not replace the calendar connection used for checking conflicts and adding meetings to your calendar.
What If You Use Outlook Desktop?
If you use a Microsoft 365 or Outlook.com account, Calendly recommends connecting the Microsoft calendar directly rather than relying on the older Outlook desktop plug-in.
Calendly also provides a separate Outlook desktop plug-in for situations where the Office 365/Outlook.com connection cannot be used.
The plug-in is designed primarily for Windows and runs locally in the background. Your computer and the plug-in need to be running for synchronization to work successfully.
Therefore, whenever possible, the direct Office 365/Outlook.com connection is generally the simpler option.
Common Calendly–Outlook Sync Problems
1. Calendly shows you as available when you’re busy
Check which Outlook calendars Calendly is using for conflict checking.
Also check how Calendly treats statuses such as Tentative, Away/Out of Office, and Working Elsewhere.
2. Calendly bookings aren’t appearing in Outlook
Check the Add to calendar setting.
Make sure the Outlook calendar you want to use has been selected as the calendar where new events should be created.
If necessary, disconnect and reconnect your Outlook account.
3. Microsoft asks for administrator approval
If you see an Approval required message, your Microsoft 365 organization may require an administrator to approve Calendly’s access to your Microsoft account.
Your Microsoft 365 administrator may need to approve the application before you can complete the connection.
4. You are using the Outlook desktop plug-in
If you’re using the older Outlook plug-in, make sure it is running in the Windows system tray and that your computer is connected to the internet.
Calendly states that the plug-in must be running in the background for synchronization to occur.
Benefits of Connecting Calendly with Outlook
A Calendly–Outlook integration can be particularly useful for businesses and professionals who schedule multiple appointments every day.
Saves Time
You don’t need to manually copy every Calendly booking into Outlook.
Prevents Double Bookings
Calendly checks your connected calendar before showing available appointment times.
Improves Client Experience
Clients can select an available time without exchanging multiple emails.
Keeps Your Calendar Organized
Calendly bookings can automatically appear in your chosen Outlook calendar.
Supports Remote Meetings
Calendly can also integrate with Microsoft Teams, allowing meeting links to be included automatically in scheduled events.
Frequently Asked Questions
Can Calendly sync with Outlook?
Yes. Calendly supports connecting Office 365 and Outlook.com calendars so it can check availability and add scheduled meetings to your selected Outlook calendar.
Does Calendly prevent double bookings?
Yes. When your Outlook calendar is properly connected and selected for conflict checking, Calendly uses those events when determining your available booking times.
Can I connect multiple calendars?
Yes, depending on your Calendly plan. Calendly currently allows paid plans to connect up to six calendars per user, while the Free plan supports one calendar.
Can Calendly add appointments to multiple Outlook calendars?
Calendly adds new bookings to one selected calendar. Connecting multiple calendars does not mean that the same Calendly booking is automatically created on every connected calendar.
What is the difference between the Calendly Outlook add-in and plug-in?
The Outlook add-in gives you access to Calendly from inside Outlook for sharing links and scheduling meetings.
The Outlook plug-in, on the other hand, connects a desktop Outlook calendar with Calendly for availability checking and event synchronization.
Conclusion
Syncing Calendly with Outlook is a straightforward way to automate your meeting schedule and avoid calendar conflicts.
The recommended approach for most Microsoft 365 and Outlook.com users is to connect the Outlook calendar directly from Calendly’s Calendar settings. Once connected, select the calendars Calendly should check for conflicts and choose the Outlook calendar where new Calendly bookings should be added.
If you’re still using the older Outlook desktop plug-in, consider switching to the direct Microsoft calendar connection if your account supports it.
With the integration configured correctly, Calendly can handle much of the scheduling process automatically, allowing you to focus on your clients and work instead of managing calendars manually.
Official Calendly guide: How to connect your Office 365 or Outlook.com calendar
