Knowledge Base

How to configure a CodeTwo domain in Office 365


After you registered your Office 365 tenant in CodeTwo Admin Panel, a new accepted domain was added to your Office 365 tenant:

[your unique ID]

When you view this domain in your Microsoft 365 admin center (Office 365 admin center), the domain may have the Incomplete setup (previously Setup in progress) status (Fig. 1.). Also, Office 365 may send you various notifications or display warnings related to this new domain.

639-1 Incomplete setup status
Fig. 1. The new CodeTwo domain added to Office 365.


The CodeTwo domain is necessary for CodeTwo Email Signatures for Office 365 to work correctly. Do not remove it from Office 365. If you did, contact us.


This new domain is used to relay your messages and improve your email security (our software uses TLS certificate-based connectors). After the domain is created, it has the Incomplete setup status. You can ignore this status and related Office 365 notifications because the CodeTwo software is configured and working correctly. Your mail flow and email signatures are not affected by this status. The Setup in progress status remains because the API used by our software does not allow us to change it in your Office 365. If you want to change this status and stop notifications, you can do it yourself in Office 365:

  1. Open your Microsoft 365 admin center and go to Settings > Domains (Fig. 1.).
  2. Click the CodeTwo domain that has the Incomplete setup status.
  3. A setup wizard opens. Click Continue setup (Fig. 2.).

639-2 Domain setup wizard
Fig. 2. Opening the domain setup wizard.

  1. You should land on the Choose your online services page (if not, use the Back or Next buttons to navigate to this page). Clear the Exchange checkbox and click Next, as shown in Fig. 3.

639-3 Online services setup page
Fig. 3. You need to deselect Exchange and click Next to complete the configuration.

  1. The wizard confirms that the configuration is successful and the wizard window is automatically closed (if not, you might need to click Finish in the last step). The status of the CodeTwo domain changes to Healthy (previously Setup complete), as shown in Fig. 4. Office 365 should not send you any domain-related notifications or display warnings anymore.

639-1 Healthy status
Fig. 4. The configuration of the CodeTwo domain is complete.