Managing personal Outlook.com account settings, security, and privacy
Hi dear Ridley,
- Try again after restarting your phone to send the SMS.
- Check if your phone or messaging app needs any software upgrades and install them if they are available.
"We’ll only send a text message to the primary phone number on your Microsoft account. If your Microsoft account doesn't have a cell number associated with it, we'll contact you using one of the methods you've provided—your email address, for example. You can change your contact information on the Microsoft account site."
Please refer to this article which is related to your problem:
- Why is Microsoft texting me?
Source: https://support.microsoft.com/en-us/account-bil...
Warm Regards,
Janbaz