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“You have reached the maximum number (15) of calendar entries”: what to do

When you save a new event, Virto Shared Calendar may show this message under the event form:

You have reached the maximum number (15) of calendar entries.

The event is not saved. This page explains why and what to do.

Why the message appears

The Free plan of Virto Shared Calendar allows up to 15 entries in each calendar. You can create as many calendars as you like, and each one can hold 15 entries.

When a calendar already has 15 entries, only a user covered by a paid license can add more to it. The message appears when the person saving the event is not covered by a valid license, for one of these reasons:

  • your organization uses the Free plan;
  • the paid license has expired;
  • your organization has a license for a set number of users, and your account is not one of the licensed users;
  • the license was bought, but Virto Shared Calendar does not see it for your organization yet.

People who only view calendars never need a license, on any plan.

If you are on the Free plan

A license is required for every user who creates or edits calendars with more than 15 entries. Open Shared Calendar > Subscription and click Purchase, or see the plans on the Virto Shared Calendar product page.

You can also keep the calendar on the Free plan: delete entries you no longer need, or start a new calendar for the next period.

If you have already bought a license

  1. Open Virto Shared Calendar in Microsoft Teams or in the browser.
  2. Go to the Shared Calendar tab and click Subscription. Opening this page reads your license from VirtoSoftware again.
  3. Check the fields on the page:
    • Edition should no longer say Free.
    • License status should be valid, not Expired or Invalid.
    • Domain is your organization’s SharePoint domain, for example contoso.sharepoint.com. The license belongs to this domain.
    • Expires on shows the end of the paid period.
  4. If your license covers a set number of users, the page shows Users count, for example 3/5. Add every person who creates or edits events to the licensed users. A user who is not on that list still gets the 15-entry limit. A license for unlimited users does not need this step.
  5. Go back to the calendar and save the event again.

There is no field for a license key in Virto Shared Calendar. If you received a key or an order number by email and the Subscription page still shows the Free edition, send the order number and your SharePoint domain to support@virtosoftware.com.

If the license has expired

The calendar shows “Your license is expired. Please renew your subscription.” A calendar with more than 15 entries then stays visible, but its events can no longer be added or edited. Renew from the Subscription page. Events you already created stay in the calendar.

Updated on October 29, 2026