Within the Google Apps online software suite, Google Calendar enables you to manage work or school events and share your roster of activities with others inside or outside your organization. Google imposes limits on how you create and manage your calendar, mostly to curb abuse of the program and prevent its underlying infrastructure from becoming overwhelmed with bogus events or email traffic. Before you encounter these limits, learn where they exist so you can plan to avoid them.

Creating Events or Calendars

Google places limits on the number of events and calendars you can create in a short span of time. Exceeding 10,000 new events can cause your edit access to shut down temporarily. Attempting to create more than 25 calendars may halt your ability to add more. You can't override these limitations by changing your settings, logging out and back in, or contacting an administrator who oversees your computer network. To regain access, you must wait until Google automatically releases the hold, which typically occurs in a few hours.

Sending or Receiving

Google Calendar includes the ability to invite guests from inside and outside your Web domain to events you add to your day. You can invite as many people as you want from your primary Google Apps domain or the secondary domains associated with it, but when you send invitations to external guests, you face limits designed to curb spammers from misusing the calendar. Expect to see an error message if you try to invite more than between 100 and 300 outsiders.

Sharing Calendars

You can share your calendars with others to build collaboration during complex projects that span long periods of time. If you exceed Google Calendar's internal sharing limits, you may see error messages and enter a read-only period in the Calendar app. You can share a calendar with 75 users in a single 24-hour period, after which you must wait to expand your sharing list. Some limits only take effect as a result of using third-party apps that manipulate the calendar.

Using Security Software

The third-party software you use to block pop-ups and browser ads, add a firewall to protect your computer or expand the functionality of your Web browser can interfere with your access to Google Calendar. If you have access to the security settings on your system, you can add the Web address for Google Calendar as a safe site and an acceptable exception to your browser protections. Before you change your privacy settings or lower your security protection, verify that you understand the ramifications of your changes.