What to do if I removed the CodeTwo domain assigned to my Microsoft 365 tenant?

Problem:

You removed the CodeTwo domain that was added to your Microsoft 365 (Office 365) tenant during the provisioning of CodeTwo Email Signatures 365.

Solution:

After you add a tenant to CodeTwo Admin Panel and the provisioning of our services is finished (learn more), a new CodeTwo domain appears in your Microsoft 365 (Fig. 1.). This domain is unique for a given tenant and must be created, so that CodeTwo connectors can work properly in your Microsoft 365 organization. See this Microsoft article to learn more about certificate-based connector configuration.

Fig. 1. The CodeTwo domain added to Microsoft 365 after provisioning CodeTwo Email Signatures 365.

If you remove this new domain, the CodeTwo connectors (and, as a consequence, the CodeTwo services associated with your tenant) might stop working.

To solve this issue, you need to follow these steps:

1. Sign in to the Exchange admin center (EAC), go to Mail flow > Rules. Write down or take screenshots of your CodeTwo transport rule (see Fig. 2.). This will later help you recreate the scope of users whose emails are routed through CodeTwo and apply your custom settings (e.g. conditions and exceptions) to the rule.

Fig. 2. These settings relate to e.g. scope of users whose emails are routed through CodeTwo.

2. Next, we recommend that you remove the CodeTwo connectors and transport rule to avoid mail flow disruption. See this article to learn how to do this automatically or manually.
3. Report the issue to CodeTwo Customer Support. They will guide you on further steps.