Board Thread:Bloons Wiki and BTD News/@comment-3153244-20130925070022/@comment-4795804-20131014171817

On Skype support pages, they say that it should be possible to access Skype from Outlook:
 * https://support.skype.com/en/faq/FA12060/how-do-i-merge-my-skype-and-microsoft-accounts

I haven't tested it, so let me know if that works.

You don't have to install the Skype application, but still you must have the Skype account.