Value Expression Operator '-'

PowerShell Help
1

Hello All,

I am new to PowerShell. I started learning it a few days ago.
I know my question my be dumb, I was wondering if any of you can help me.

I was using Exchange Management Shell and I trying to change a PramaterType called UseDatabaseQutaDefaults as $True for a user.

Given:
I had assigned the user’s mailbox to a variable $s. The reason was b/c I want to be able to assigned multiple names or use the Get-Content in the future if I have a bulk of users.
$s = Set-Mailbox Test.User

Commands that I tried changing the UseDatabaseQuotaDefaults
$s UseDatabaseQuotaDefaults $True
$s -UseDatabaseQuotaDefaults $True

I’m getting the following error
Missing expression after unary operator ‘-’.
At line:1 char:7

  • $s | - <<<< UseDatabaseQuotaDefaults $true
    • CategoryInfo : ParserError: (-:String) , ParentContainsErrorRecordException
    • FullyQualifiedErrorId : MissingExpressionAfterOperator

I was wondering if someone can explain to me why this doesn"t work. I"m exploring PowerShell right now to see what other ways I can do it.
I know it works if i do "Set-Mailbox Test.User -UseDatabaseQuotaDefaults $True

2

$s contains whatever is output from Set-Mailbox. I’m not sure that Set-Mailbox actually outputs anything, so $s may be null.

Set-Mailbox -Identity TestUser -UseDatabaseQuotaDefaults $true

Would run the command, changing the user’s quota to use the database quota defaults. This change is done by running the command, and providing parameters to the command.

3

Thank You Don.
That make sense that $s maybe null. I’ll explorer around a little bit more on how it works.
Since, I started learning PowerShell. I always thought that when assigning a Variable to whatever contents are stored in that Variable. I could always call the Variable to do certain Commands/Changes.
I guess I should read more about assigning a variable to Get-Content or using Script Block.