A Microsoft Account (Windows Live ID) is required to sign up for the Skype for Business Preview Program. If you need to create a new Microsoft Account, or link a login to your current business account, you can do that here.
Microsoft Employees should use their corporate credentials for sign in.
On the next page, please select the appropriate option of the two highlighted in the image below.
How to get support
Throughout the Skype for Business Preview program, you will be able to get support on the preview features that you are trying out.
Support for non-business critical issues will be provided M-F 6AM-9PM EST.
You need to be signed in to submit a service request. Also, once a Preview program has been released to general availability, support requests should be filed through normal support channels via https://support.microsoft.com/en-us.
On Premises Support
In order to get support, please go here and complete the form: http://aka.ms/SfBPreviewOnPremSupport
This process should only be used for features that are currently in preview. For support tickets related to non-preview features, please continue to use your existing support channel.
If you are an online/hybrid customer, please use the Office 365 Admin Center to file your support ticket.