# SMC - Shared Mailbox Contacts

The SMC data source in SCA provides access to contacts stored in **shared mailboxes in Exchange Online**. A user can only see contacts from a shared mailbox if they are a **member of that shared mailbox**. Contacts are queried via the **Microsoft Graph API**, and remain **managed within Exchange Online in the corresponding shared mailbox**.

#### App Configuration Parameters

**Defaults (**[**`SecContacts.Defaults`**](https://docs.secure-contacts.com/documentation/app-configuration-policy-name-values-for-sca/sca-configuration-seccontacts.defaults)**):**

* [**SMC\_Enabled**](https://docs.secure-contacts.com/app-configuration-policy-name-values-for-sca/sca-configuration-seccontacts.defaults#enable-or-disable-features) → Enables or disables the SMC data source.
* [**SMC\_InitValue**](https://docs.secure-contacts.com/app-configuration-policy-name-values-for-sca/sca-configuration-seccontacts.defaults#initial-value-set-by-default) → Defines the default state of the user’s switch in the app (on/off). This controls whether the data source is visible or hidden when the user first launches SCA.

**Shared Mailbox Configuration (**[**`SecContacts.SharedMailboxContacts`**](https://docs.secure-contacts.com/app-configuration-policy-name-values-for-sca/sca-configuration-connect-additional-datasource#seccontacts.sharedmailboxcontacts)**):**

* [**SecContacts.SharedMailboxContacts**](https://docs.secure-contacts.com/app-configuration-policy-name-values-for-sca/sca-configuration-connect-additional-datasource#seccontacts.sharedmailboxcontacts) → Configure the shared mailbox(es) to be used as contact sources.
* Administrators can define multiple shared mailboxes as separate data sources if required.

**Additional Steps:**

* Ensure the user is a **member of the shared mailbox** to access its contacts.

**Customization:**

* [**SecContacts.CustomDatasourceNames**](https://docs.secure-contacts.com/documentation/app-configuration-policy-name-values-for-sca/sca-configuration-seccontacts.customdatasourcenames) → Assign friendly display names for the SMC source.

#### Requirements to Access SMC Contacts

To access shared mailbox contacts in SCA, a user must have:

* **Membership in the shared mailbox**
* **Authorized access to Exchange Online**

#### Requirements for SMC Contacts

Any **shared mailbox contact** to be shown in SCA must have the following fields populated:

1. **First name**
2. **Last name**
3. **Valid phone number**

**Note:** All eligible ABS contacts that meet these requirements will appear in SCA

{% hint style="success" %}

* Each data source, including SMC, can be **hidden by the user** if they do not want to see or use it.
* Hiding the SMC data source does **not affect Caller Identification** — contacts from hidden sources will still resolve incoming calls.
* The SMC data source is only available with the **Enterprise Edition** of SCA.
  {% endhint %}