(and prevented a couple of helpdesk calls when login to conference failed)
Here is another example of how I use the get-assignedLineURI in my deployments
I run my script with the following switch: .\Get-AssignedLineURI.ps1 -ListAsGridView
Then I use simple filters in gridview to list all users with a LineURI where EXT is empty.
This simple task identified 12 users with a missing EXT (among 300 users) in just a couple of seconds.
Using this information it was easy to fix these users, without them ever knowing they had an issue :)