# 2. Activate subdomain

#### Activating the subdomain name <a href="#docs-internal-guid-465d44b1-7fff-8d29-96ae-a7ea6a8b6705" id="docs-internal-guid-465d44b1-7fff-8d29-96ae-a7ea6a8b6705"></a>

{% hint style="info" %}
After you register a domain name, you need to activate it by adding at least one user and assigning a SIP address with the FQDN portion of the SIP address matching the created subdomain in the customer tenant. The license can be revoked from the user after the subdomain activation (it can take up to 24 hours).

For example: '<test@sbc1.customers.adatum.biz>'
{% endhint %}

* In the Microsoft admin centre, go to Users > Active users > click Add a user.

<figure><img src="https://1128185770-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LYT_KLa68bpbaUhamSb%2Fuploads%2Fx8Ldwnz5E8Ye0UJjR8OO%2Funknown.png?alt=media&#x26;token=d02627b6-5123-4119-a8bf-31d06d568176" alt=""><figcaption></figcaption></figure>

* Fill in the User details, select Domain: sbc1.customer.adatum.biz, Assign License and click Add.

<figure><img src="https://1128185770-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LYT_KLa68bpbaUhamSb%2Fuploads%2FAdPeqqpMtv4iCVIPyTVk%2FIMG_268?alt=media&#x26;token=d2010370-64f9-49ec-b9be-d0faf0dca417" alt=""><figcaption></figcaption></figure>