> ## Knowledge Base Index > Fetch the complete knowledge base index at: https://help.anghello.com/sitemap.xml > Use this file to discover available pages before exploring further. > Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash). # Pre-register an appointment from Outlook or Google Calendar > Create a pre-registration simply by inviting a dedicated email address to your calendar event. Your colleagues keep their habits (Outlook, Google Calendar, Teams) and Anghello syncs the visit automatically. **Audience:** Hosts, Administrators, Managers **Application:** Outlook, Google Calendar, Microsoft Teams **Estimated time:** 1 minute --- ### Before you start * Preregistration and the invitation address must be configured on the site. See [Configure the calendar import address](https://help.anghello.com/en/article/set-up-the-calendar-import-address-1wuadgh/). * You must be an **Anghello user of the site** (host or admin): the email you use as the organizer must be the one on your Anghello account. --- ### Steps ### 1. Create an event in your calendar Open Outlook, Google Calendar or Teams, and create a new event as you usually would. ### 2. Add your external visitors as guests Invite your external visitors (up to 10 per event) by adding them to the participant list. ### 3. Add the Anghello invitation address Also add your site's invitation address (for example `my-site@invit.anghello.com`) to the recipient list. ### 4. Send the invitation Click **Send**. That's it! Within a few seconds, Anghello creates one pre-registration per external visitor. --- ### What Anghello does automatically for you * **Your external visitors** become pre-registrations in Anghello. * **You** are identified as the **host** of each visit (thanks to your organizer email). * **Internal colleagues** invited to the same event are ignored (they don't become visitors). * **Teams resources** (rooms, equipment, projectors) are ignored. * **If you edit the event** (date, time, guest list), Anghello updates the corresponding pre-registrations. * **If you cancel the event**, the visits are automatically cancelled in Anghello. --- ### Good to know 💡 **Tip:** Your calendar remains the source of truth. No need to edit the visit in two places (Anghello + calendar): a change in your calendar is enough. 💡 **Tip:** "All-day" events (a whole day, with no specific time) are automatically converted to a `00:01 – 23:59` time slot. --- ### Troubleshooting | Problem | Solution | | ---- | | The visit doesn't appear in Anghello | See [My visitor didn't receive the pre-registration email](https://help.anghello.com/en/article/frequently-asked-questions-and-troubleshooting-polfte/). | | I have more than 10 visitors to invite | Use [manual preregistration](https://help.anghello.com/en/article/manually-pre-register-a-visit-17i9h05/) in the Admin app instead — no batch limit. | | The event is rejected as "unauthorized sender" | Check that you are the organizer and that your email matches your Anghello account. | If the problem persists, [contact our team](mailto:support@anghello.co).