How to add personalized message to voicemail?

By default, you are given a rather bland “The person you are trying to call is not available …” prerecorded message. This is what callers hear when they are redirected to your voicemail. However, you can replace the prerecorded message with a personalized greeting of up to sixty seconds in duration.
Go to Skype: Tools: Options …, and in the window that appears, click on Call Forwarding & Voicemail. A settings window appears, as shown in the next figure.
Look under the heading “Welcome Message” at the bottom of this page. To record a personalized greeting for your voicemail, click on the middle square button with the red circle on it. Speak into your microphone (or headset or handset) to record your greeting and then either click on the same red button again to cut the recording short, or let the recording run to the end of its allotted 60 seconds. You can now review your greeting by clicking on the green square button with an arrow on it. Now, when callers are directed to your voicemail, they will hear your personalized greeting message.
If you’re not satisfied with the greeting, you can either rerecord it by hitting the middle red square button again and repeating the recording procedure, or you can click on the red square button with a circular arrow on it to reset your greeting to the default message.