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In Microsoft Office Outlook there is an add-in called Microsoft Outlook SMS Add-in (MOSA), which provides the ability to send text messages (SMS). MOSA is builtin to Outlook 2010, and are available as a plugin for Outlook 2003 and 2007 here.

On the Microsoft Office Online Help you can find guidance on how to set up the service account and sending a text message. To find the necessary settings for your mobile service provider, go here.

I looked into the COM-object for Outlook, and it turned out to be rather easy to use this API to send text messages from MOSA.
Based on that I created an Advanced function in Windows PowerShell v2 called Send-SMSMessage.

To define the function you can either paste it directly into your session, save it as a ps1 script-file and dot source it, put it into your profile or into a module.

When that is accomplished you can find usage information using the consistent Get-Help cmdlet:

Sample usage:

The function checks if Outlook are installed, and breaks out with a warning if not:

It also checks to see if an account are configured for Text Messaging (SMS):

Any errors related to service availabilty, correct phonenumber format and so on are handled by the SMS Add-in itself. These error messages appear in the Outlook inbox:

The function is tested from Outlook 2010 only, but should work from 2003 and 2007 also when MOSA is installed.

Since the function accepts ValueFromPipeline and ValueFromPipelineByPropertyName you can use it in conjunction with e.g. the Active Directory cmdlets for Windows PowerShell.  A given example of this retrieves all users from Active Directory with a derfined mobilephone number and sends them an SMS with their username:

Another practical usage scenario I can think of is combining the Send-SMSMessage function with user provisioning, sending the new user it`s new username and password.
Feel free to come up with more usage scenarios in the comment field below.

Bonus tips

• You can also send MMS messages using the Outlook COM-object. To do this, use “olMobileItemMMS” instead of “olMobileItemSMS” in the following line: $NewMessage = $outlook.CreateItem(“olMobileItemMMS”). You should also look into the other properties for MMS messages, like the Attachment-property.
• If you got more than one account configured for text messaging, you can use the SendUsingAccount-property to define which account to send from.
• If you use the Norwegian mobile service provider Telenor, the “Service Provider URL” in the account settings is https://telenormobil.no/smapi/services/omsv3_service