The correct option is False.

Microsoft Entra Connect does not support synchronizing on premises forests or domains that use dotted NetBIOS names. Dotted NetBIOS names are treated as invalid for the connector because they conflict with the expected distinction between NetBIOS and DNS naming and cause problems with how the synchronization service maps and references domains.

Because of this naming restriction you must use non dotted NetBIOS names or rely on alternate approaches such as ensuring users have UPN suffixes that match verified Azure AD domains or renaming the domain which is an intrusive operation. The product enforces the limitation during configuration and synchronization attempts will not succeed with dotted NetBIOS names.

True is incorrect because it asserts that Entra Connect can synchronize domains that use dotted NetBIOS names. That claim contradicts the documented naming limitations and practical behavior of the synchronization product.

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