Share Outlook Calendar Free/Busy Only: Setup & Limits

Yes. You can share an Outlook calendar so a person sees when you are available or busy without seeing event titles, locations, or notes. In Microsoft 365, choose Can view when I’m busy in new Outlook, or Availability only in classic Outlook for Windows.

What free/busy sharing means

Free/busy sharing gives another person a view of your calendar’s availability blocks rather than the details of your appointments. They can use those blocks to find a time that does not conflict with your schedule, but the permission does not let them read the event subject, description, location, or attendee list. It also does not give them permission to add or change appointments.

It is a permission for a particular calendar and recipient, not a switch that hides every calendar you own from everyone. If you have more than one calendar, check which one you are sharing. A work calendar, a personal calendar, and a separately created project calendar can have different sharing settings.

Free/busy is useful for coordinating meetings while keeping appointment content private. For example, a colleague may see that Tuesday from 10:00 to 10:30 is unavailable, but not that the event is called Annual Review or that it is at a medical clinic. Keep in mind that even a blank busy block can reveal patterns, such as a recurring weekly commitment.

How to share availability in Outlook

The labels and placement vary a little between classic Outlook, new Outlook, and Outlook on the web, but the basic process is to share a calendar with a named person and select the lowest permission that reveals availability only.

Open Calendar. Confirm that you have selected the calendar you intend to share. This matters if your calendar list contains several calendars.
Start sharing. In new Outlook or Outlook on the web, use Share or Share calendar for the selected calendar. In classic Outlook for Windows, go to Calendar, choose Home > Share Calendar, and select the calendar if Outlook asks.
Enter the recipient. Add the person’s work or Microsoft account email address. Sharing with an email address is different from publishing a public calendar link.
Choose the availability-only permission. In new Outlook or the web version, choose Can view when I’m busy. In classic Outlook for Windows, choose Availability only in the sharing invitation’s details list. Do not choose an option that says titles and locations or all details.
Send the invitation. The recipient may need to accept it before the calendar appears in their calendar list. The recipient’s organization or account type can affect whether sharing succeeds.

In classic Outlook, you can also inspect permissions from the calendar’s properties. Select the calendar, open its properties, and look at the Permissions tab to see who has access and at what level. In new Outlook and Outlook on the web, use the calendar’s sharing or permissions controls to review access. If a control is missing, your organization may manage calendar sharing centrally.

What the recipient can and cannot see

With an availability-only permission, the other person generally sees time blocks marked with an availability state, such as busy, tentative, or out of office, depending on the Outlook view and account. They can use the information in scheduling tools such as Scheduling Assistant, or view the shared calendar if their Outlook setup supports it. They do not get the information needed to identify what each appointment is about.

They can generally see: which time ranges are available or unavailable, and the availability status Outlook exposes for those ranges.
They cannot see through this permission: event subjects, message text, attachments, locations, or the names of meeting attendees.
They cannot do: edit, delete, or create events on your calendar solely because you shared availability.

Do not confuse an event marked Private with a calendar shared at availability-only permission. Private is an event-level setting that can limit details for people who otherwise have broader calendar access; availability-only is a calendar permission that withholds details across the shared view. If you grant someone a more detailed permission, private-event handling and delegate settings can affect what they see, so review the relevant permission description rather than relying on the word private alone.

Sharing with coworkers and people outside your organization

Within a Microsoft 365 work or school organization, calendar free/busy access may already be available to coworkers under the organization’s default settings. That is why a colleague can sometimes use Scheduling Assistant to find open times without receiving a separate sharing invitation. The exact amount of information available by default is controlled by the organization and may differ between companies.

Explicitly sharing with a named coworker lets you choose a permission for that person, subject to your organization’s rules. Sharing with someone outside the organization is less predictable: an administrator can restrict external calendar sharing, and the recipient’s email or calendar service may not support the same experience. If Outlook will not send the invitation or the recipient cannot open the shared calendar, ask your Microsoft 365 administrator whether external sharing is allowed.

Personal Outlook.com accounts and work or school Microsoft 365 accounts do not always present identical sharing screens or policies. A recipient may also be asked to sign in, accept an invitation, or add the calendar in their own app. Sharing free/busy is not the same as making a calendar public; avoid a publish or public-link option if you only want one person to see availability.

Choosing the right permission level

Use the least access that meets the coordination need. Outlook’s labels can vary by version, but the usual progression is availability only, limited details such as titles and locations, full details, and editing or delegate access. These levels are not interchangeable: a person who only needs to book a meeting normally does not need event descriptions or the ability to change your calendar.

Availability only: appropriate when someone only needs to find a free time.
Titles and locations or limited details: useful when a close team needs context about blocks, but unnecessary for basic scheduling.
All details: gives substantially more insight into appointments and should be reserved for recipients who need it.
Can edit or delegate: intended for someone who must manage calendar items or, for delegate access, handle scheduling on your behalf. It is not a free/busy option.

For example, if a project partner only needs to arrange a 30-minute review, availability-only access is usually sufficient. If an assistant must reschedule appointments, a view-only permission will not meet that need; discuss the appropriate editing or delegate arrangement instead. Granting broader access just to make scheduling easier exposes more information than the task requires.

Changing or removing access

You can usually change a recipient’s permission later or stop sharing altogether. In the calendar’s sharing or permissions area, find the person and choose a lower permission, a different permitted level, or remove their access. In classic Outlook, the calendar’s properties and Permissions tab show named users and their assigned levels. In new Outlook or the web version, use the calendar sharing controls to manage the people who have access.

After changing access, allow time for the update to appear in the recipient’s app. They may need to refresh Outlook, close and reopen the calendar, or remove and add the shared calendar again if an old view persists. Removing access should prevent future access through that permission, but it cannot erase information the recipient already saw, copied, photographed, or exported.

If you shared a public calendar link rather than inviting a specific recipient, revoke or replace the published link using the calendar’s publishing controls. Removing a person from a named sharing list is not necessarily the same as disabling a public link. Check both routes if you are unsure how the calendar was shared.

Common problems and privacy checks

If the recipient sees appointment subjects despite your intention to share only free/busy, first verify the permission assigned to that exact person and calendar. Check whether they have a second route to the calendar, such as membership in a group, a separate sharing invitation, delegated access, or organization-wide permissions. Also confirm that you are checking the correct calendar; changing one calendar does not automatically change every calendar in your account.

If you cannot select availability-only access, or the share command is unavailable, possible causes include an administrator policy, a calendar stored in a location that does not support the same sharing feature, or a recipient outside the allowed sharing boundary. Outlook versions and account types differ, so the option names can also differ. In a work account, the Microsoft 365 administrator is the right person to ask about policy restrictions.

If an invitee sees no availability, check that they accepted the invitation, are signed into the account you invited, and are looking at the shared calendar or using Scheduling Assistant with the correct address. A calendar’s working hours and time zone can also make the displayed schedule look different from what you expected. For important meetings, confirm the proposed time directly rather than assuming a blank-looking area proves the person is free.

Alternatives when sharing is not suitable

You do not have to share an ongoing calendar view to arrange one meeting. You can send a few proposed time slots, use Scheduling Assistant when participants are in the same organization and their availability is accessible, or use a meeting-polling feature approved by your organization. A booking page can be useful when many people need to reserve appointments, but it is a different setup and may reveal or collect information under separate settings.

For a one-time coordination request, manually offering times can disclose less about your schedule than granting continuing access. For a team that schedules together every week, availability-only calendar sharing is more convenient. Choose based on how often the other person needs to coordinate and what information they genuinely require.

Frequently Asked Questions

Can I share Outlook calendar without showing event details?
Yes. Choose Can view when I’m busy in new Outlook or Outlook on the web, or Availability only in classic Outlook for Windows. The recipient can see availability blocks, not ordinary event details.

Can someone see the title of a private event with free/busy access?
Availability-only access does not show event titles, including titles on private events. Private is a separate event setting; do not use it as a substitute for assigning the recipient an availability-only calendar permission.

Can I share free/busy with someone who does not use Outlook?
Sometimes. External sharing depends on your organization’s policy, the recipient’s account, and the calendar application they use. Send a named invitation and confirm that the recipient can open it; if external sharing is blocked, ask your administrator about an approved alternative.

Why can a coworker already see when I am busy?
Your organization may make basic free/busy information available to coworkers by default so they can schedule meetings. That default is controlled by Microsoft 365 settings and can differ from the permissions you explicitly assign to an individual.

Does free/busy sharing let someone change my calendar?
No. Availability-only access is for viewing availability. Editing events requires a separate permission, and delegate access is a broader arrangement for someone who manages scheduling on your behalf.

Try it: the Date Difference Calculator: days, months, years and weekdays between two dates, with the DATEDIF formulas.

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