Can you use Skype for business externally?

Related questions

1. How much does business Skype cost?
2. Can I install Skype for business only?
3. Is Skype for business secure?
4. Can Skype for business call normal Skype?
5. Is there a Skype for Mac?
6. Is Microsoft replacing Skype for business?
7. Can I download Skype for business for free?
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9. Can I use Skype for business with regular Skype?
10. How much does Skype cost for businesses?

Tags

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8. #company
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11. #communicating
12. #federation
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15. #calls
16. #video
17. #enabled
18. #business
19. #skype