Yes, it is recommended. You can add other emails as well once you set it up.
This link will help you create an account and skype if you do not have it already.
This will help you add other emails:
To add another email address to your Skype profile:
Sign in to your account.
Click your profile picture, or select Edit Profile in the Account details section at the bottom of the page.
3. Scroll down to the Contact details section and click Add email address.
4. In the box that appears, type your new email address and click the green Save button at the bottom of the page.
The email address is added to your profile. No one can see your email addresses - they are only visible to you when you sign in to your account.
You can add up to three more email addresses - just follow the steps above.
Due to ongoing changes, unlinking of Skype and Microsoft accounts is currently unavailable.
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