out information to share

I have this code below which does everything expect create the output file on the server. Now, I can manually create a .txt file on this share
so I do have the needed rights. Also, this snippet works and will create the .txt on the server share.

$LU="TestUser2"
$LU | Out-file"\\Server\logs\$LU.txt"

But the following does not create the .txt on the serve share. (at the bottom I included the output of my program)

$LU= [Environment]::UserName
$LU
$HasRun=Test-Path"\\server\Logs\$LU.txt"
$HasRun

If ($HasRun) {Exit}
net localgroup administrators > c:\temp\$LU.txt
$IsMember=Get-Content c:\temp\$LU.txt
$IsMember

If ($IsMember-contains$LU) {$LU | Out-file"\\server\Logs\$LU.txt"}

##  I have tried many different things on this IF statement.  -contains, -like, -eq '*$LU*' etc...etc....

##### OUTPUT #####
TestUser2
False
Alias name administrators
Comment Administrators have complete and unrestricted access to the computer/domain

Members

-------------------------------------------------------------------------------
Administrator
ACME\Domain Admins
ACME\TECHTEAM
ACME\TestUser2
The command completed successfully.