Send Text Reminders with Outlook 
This tutorial explains how to publish/link to your Outlook calendar(s) in order to send automated SMS text and email appointment reminders.
Outlook is part of the Microsoft Office suite and provides email, calendar, contact manager, task manager and related applications. It is used extensively by individuals and organizations to manage their information, events and activities. It began purely as Desktop software but has since grown to include a web application and mobile apps on various platforms.
To share your calendar with other people or applications you need to Publish it using the online version of Outlook (previously known as Outlook on the Web, Outlook Web App and OWA). Publishing a calendar is only possible if your organization uses Office 365, Microsoft Exchange or Outlook.com. When you publish a calendar it creates a special link/URL which you can share with anyone you want to be able to view your calendar. For security, when you supply an ICS link to an app access is read-only, so the app cannot edit your calendar in any way.
These steps are based on the details provided for the Outlook Calendar system in the UK, local variations in other countries may apply and should be checked with Microsoft.
Select your version of Microsoft Outlook below in order to set up SMS Client Reminders to automatically send out text and email reminders.
Not sure what version you're using? All Microsoft Exchange accounts come with 'Outlook online' access, which allows you to securely view your exchange mailbox from any web browser, without using Outlook itself. If your email address ends in @hotmail.com, @outlook.com or @live.com then you're not using 'Outlook online' but rather Outlook.com, the free email service (formerly known as Hotmail - yes we know it's confusing!).
Note: If using Outlook with an Exchange server or Office 365, calendar publishing may not be enabled for your account. Please contact your system admin if not.
To share your calendar with users or applications outside your organization with Office 365 follow these steps:
(bar at top, on the right)
Now you have your ICS calendar link, to set up appointments reminders by text for Office 365:
The calendar will now be scanned for appointments and checked for any updates. When it identifies an appointment a reminder will be set up automatically.
Important: Enter the client name (if using Client Name mode) or phone number (if using Direct Input mode) in the Event Name or Description fields to ensure it is imported correctly. The Required Attendees field will not work.
Important: Publishing an Outlook 2016 calendar is only possible if your organization uses Office 365 or Microsoft Exchange.
To share your calendar using Outlook/Exchange 2016 just follow these steps:
Now you have your ICS calendar link, to set up appointments reminders by text for Outlook 2016:
The calendar will now be scanned for appointments and checked for any updates. When it identifies an appointment a reminder will be set up automatically.
Important: Enter the client name (if using Client Name mode) or phone number (if using Direct Input mode) in the Event Name or Description fields to ensure it is imported correctly. The Required Attendees field will not work.
Important: Publishing an Outlook 2013 calendar is only possible if your organization uses Office 365 or Microsoft Exchange.
To share your calendar using Outlook/Exchange 2013 follow these simple steps:
Now you have your ICS calendar link, to set up appointments reminders by text for Outlook 2013:
The calendar will now be scanned for appointments and checked for any updates. When it identifies an appointment a reminder will be set up automatically.
Important: Enter the client name (if using Client Name mode) or phone number (if using Direct Input mode) in the Event Name or Description fields to ensure it is imported correctly. The Required Attendees field will not work.
To share your calendar with Outlook/Exchange 2010 you just need to follow these steps:
Now you have your ICS calendar link, to set up appointments reminders by text for Outlook 2010:
The calendar will now be scanned for appointments and checked for any updates. When it identifies an appointment a reminder will be set up automatically.
Important: Enter the client name (if using Client Name mode) or phone number (if using Direct Input mode) in the Event Name or Description fields to ensure it is imported correctly. The Required Attendees field will not work.