Microsoft is introducing the service in the UK, with the US and Germany following “in the coming weeks” and worldwide “in the coming months”.
When a user links their Outlook.com account with Skype, they will be prompted to install a browser plug-in which enables the integration, said US reports.
The plug-in supports the most recent versions of Chrome and Firefox as well as Microsoft’s Internet Explorer in a sign that Microsoft is learning from past mistakes by giving users a choice.
“Sometimes that quick call can accomplish more than a long email reply. That’s why we are bringing Skype audio and video calling to your Outlook.com inbox,” said Microsoft.
The introduction of Skype is the latest in a series of updates to Microsoft’s Outlook.com service and the first real integration project with Skype since Microsoft acquired the company in a $8.5bn deal.
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The UK launch is a preview version that will be updated based on initial feedback.
The browser plug-in is not needed for instant messaging using Skype on Outlook.com, but audio and video calls will require it.
The integration also works for Microsoft's Messenger service, allowing users to video call Messenger users from Outlook.com.