To install and configure X-Lite softphone as an endpoint, follow the instructions:
First, download current X-Lite build here
Install X-Lite Softphone, follow instructions/screenshots:
hit Next
Accept the terms and hit next
Hit Install
Launch X-Lite
On first Launch, choose Allow Access (this is from Windows 10).
Setup and Configure X-Lite
Go to Softphone -> Account Settings
Using your Team Member credentials, to find this go here
Where
User ID = SEP Number
Domain = Proxy Server
Password = SEP Password
Click OK. DONE!