keep employees from registering with their company email

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Hi,

we are using teamviewer in our company and also have the management console.
When we want to add a new employee to be able to use teamviewer we add him to a group in our AD.

The problem is, that some employees have already created their on teamviewer Account with thier company email address.
Is there a way to register your domain so if they try to create an account this gets mapperd to our domain and we get notified and can allow (or not) the registration of the employee ?

- Marius