Mobile phone number verification fails with "Phone number not allowed"

1. If using local users, verify that user has phone number configured.
2. If using external user sources, verify that user has mobile phone attribute set.
3. If using Active Directory user, verify attribute Mobile (Active Directory Users and Computers → User properties → Telephones tab).
4. Verify that phone number format is correct, it has to follow international format: COUNTRY CODE + NUMBER, e.g. for Latvia “371 23456789”. Number can contain spaces and + or - signs.
5. If you have user source with numbers in national format (without COUNTRY CODE), you can configure default country prefix with:

ntk cfg setc :nas.phone_country_code 371