Search and replace registry entry value using powershell

I'm trying to update a set of registry keys, a set of properties need to be updated with a new value based on the old value. I tried using the following: ``` Get-ItemProperty -Path HKCU:\Software\xxxxx\*.mydomain.com Uri | set-itemproperty -Path { $_.PSPath } Uri -Value { $_.Value -Replace ".mydomain.com/", ".mynewdomain.com/" } ``` But that sets the value of the uri property to: `{ $_.Value -Replace ".mydomain.com/", ".mynewdomain.com/" }` I tried: ``` Get-ItemProperty -Path HKCU:\Software\xxxxx\*.mydomain.com Uri | set-itemproperty -Path { $_.PSPath } Uri -Value ${ $_.Value -Replace ".mydomain.com/", ".mynewdomain.com/" } ``` And ``` Get-ItemProperty -Path HKCU:\Software\xxxxx\*.mydomain.com Uri | set-itemproperty -Path { $_.PSPath } Uri -Value ( $_.Value -Replace ".mydomain.com/", ".mynewdomain.com/" ) ``` But that clears the value. I want to update multiple registry values in multiple keys with as few lines as possible. I already got it working by exporting the registry, use notepad to search and replace and then re-import the registry entries, but that felt like cheating. I really want to know how I can achieve this using Powershell. Other things I've tried: `$(...)`, `(...)`, omitting the `-Value` option you name it :S. I tried replacing `$_.Value` with `$_.Uri` and `$_`, didn't work either. The problem is now resolved and the answer used to give guidance on how to update your TFS project collection settings for the new Team Foundation Services.