Name changes are a common occurrence in the world of IT and usually the primary concern is the e-mail address. Exchange e-mail address policies will handle this for us but often times the Sip Address and User Principal Name are left behind. I tackle these changes with an automated way of changing the Lync / Skype for Business sip address (also known as sign-in address) and User Principal Name to match the e-mail address. I also include the link to download the Lync / Skype for Business meeting update tool that is required when a Sip Address is changed. Head on over to PowerShellBlogger.com for the full article.