# IYS Sync Mode

The IYS Sync Mode enables businesses to treat **IYS as the master system** of record for user communication consents. With this mode, Netmera can **read** and **update** existing user records in IYS but cannot create new users.

### Two Modes of IYS Integration

<table><thead><tr><th width="211.1990966796875">Mode</th><th>Description</th><th>Key Behavior</th></tr></thead><tbody><tr><td><strong>IYS Sync Mode</strong></td><td>IYS is the master source and Netmera regularly imports consent data</td><td>Netmera can <strong>read</strong> and <strong>update</strong> existing user records in IYS but cannot create new users.</td></tr><tr><td> <strong>IYS Integrator Mode</strong></td><td>Netmera manages permissions and updates IYS directly</td><td>Netmera can <strong>create</strong> your brand entry under a user’s IYS profile and <strong>push</strong> <strong>consent</strong> <strong>records</strong> directly to IYS.</td></tr></tbody></table>

### Step 1: Access the Integrations Section

1. In your **Netmera Panel**, navigate to **Integrations**.
2. Locate **İleti Yönetim Sistemi** under **Data Security**.
3. Click **Install** to start the integration.

### Step 2: Enter Your İYS Credentials

When prompted:

* **Brand Code:** Retrieved from your İYS account.
* **İYS Code:** Retrieved from your İYS account.

These codes are required to activate the integration.

**Optional settings:**

* Via Integration: If you want to use Via, select the checkbox. *(*&#x53;ee detailed documentation [here](https://user.netmera.com/netmera-developer-guide/integrated-modules/via-integration) for configuration instructions.)
* İYS Integrator: If you want Netmera to act as the source for updating İYS records, check İYS Integrator and continue from the [IYS Integrator Mode](/netmera-user-guide/customer-data/iys-permissions/iys-integrator-mode.md) page.

<figure><img src="/files/ZCNw6lAp20sGWwdEkT8I" alt="" width="563"><figcaption></figcaption></figure>

### Authorizing Netmera in the İYS Panel

To enable full functionality, you must authorize Netmera within the İYS platform:

1. Log in to your IYS Panel.
2. Go to the **İş Ortaklığı (Partnerships)** section.
3. Search for and select **Netmera** as your solution partner.
4. Make sure the following permissions are enabled:
   * Message Permissions
   * Call Permissions
   * Email Permissions

This step allows Netmera to receive and manage user permission data on your behalf, ensuring that all communication is aligned with İYS regulations.

<figure><img src="/files/6jHdqs8b69zlWF3PgQEQ" alt="" width="489"><figcaption></figcaption></figure>

Once the integration is installed, **Netmera will automatically begin syncing user permissions** with İYS.

* The **initial synchronization** starts overnight and runs in batches until all existing user records are processed.
* After the initial sync is complete, Netmera will continue to **update user permissions** based on your latest İYS data.


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