Troubleshooting application registration

If you choose the Automatic registration option when configuring a source Office 365 connection in the program, the connection wizard attempts to register CodeTwo Exchange Migration in your Microsoft Entra ID (Azure Active Directory). If the attempt fails in the Configuration step (Fig. 1.), click Details to learn more about the reason for the failure.

Fig. 1. Failure to register CodeTwo Exchange Migration in Entra ID.

The most common error messages related to application registration are listed below. Study them and learn about possible solutions.

Failed to register CodeTwo Exchange Migration with tenant '<Tenant ID>'.

This error usually occurs if the account provided in the Application registration step of the connection wizard doesn't have enough permissions to perform the registration. You need to close the connection wizard, open a new one, and this time use the account with the Global Administrator or Privileged Role Administrator permissions in the Office 365 tenant that you intend to connect to.

Keep in mind that even though the program failed to register itself, it has created the CodeTwo Exchange Migration Source entry in your Entra ID (Azure AD). However, this application is missing the necessary permissions that only a user with either of the above-mentioned roles can grant. You can delete this application by following these steps or grant the necessary admin consent in the Microsoft Entra admin center and then configure server connection by following the manual registration path.

Try also updating the program to newest version, which you can find here.