# Configuration

**Note:**\
**If you don’t want all SMS addons to be installed, you can go for any one SMS addon installation.**

For example,

Magecomp\_Mobileloginmsg91

* **SMS Addons are already added to our standard extension package.**
* **One SMS Addon is required to get a dropdown in SMS API configuration.**

Once you have successfully installed the extension, go to **Store -> Configuration** to configure the extension for use.

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* **Out of Stock Notification:** Option to enable or disable extension.
* **Select Customer Groups:** Select customer groups to allow in stock notification box.
* **Notification Type:** Set allowed notification type as SMS, Email or both as per need.
* **Email Sender:** You can set default email sender for customer in stock notification.
* **Email Template:** Set email template, you want to assign for email notification.

Now go to **Stores > Configuration > Catalog > Catalog > Product Alerts**

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* **Allow Alert When Product Comes Back in Stock:** Enable it to YES and customers will be notified when the product is back in stock.