Multiple condition in where clause - powershell

Question

When I execute below code, I get an error as : A parameter cannot be found that matches name or. How can I get user list who don't have abc.com or xyz.com in their email address?
Get-ADGroupMember -Identity "AQ" -Recursive | where objectClass -eq 'user' | Get-ADUser -Properties *, "msDS-UserPasswordExpiryTimeComputed", PasswordNeverExpires |
where mail -notmatch "#abc.com" -or "#xyz.com" |
Select-Object #{Label = "SAM Account Name";Expression = {$_.SamAccountName}}

Answer 1

The curly braces (actually a scriptblock with the filter script) can not always be skipped with Where-Object.
You can do Where-Object objectClass -eq 'user' but everything that involves more than a single operator requires to be written as a filter script:
where {$_.mail -notmatch "#abc.com" -or "#xyz.com" }
Now this logic doesn't work, as this is equivalent to the following statement:
where {($_.mail -notmatch "#abc.com") -or $true }
So your where clause is true, regardless of the result of the -notmatch operation. You want two -notmatch operations instead:
Where-Object - { $_.Mail -notmatch '#abc.com' -and $_.Mail -notmatch '#xyz.com' }
Depending on the amount of email addresses, that you want to exclude in your filter script, you might want to use a different approach: Strip the user name from the email address and see, if this address appears in the array of email addresses that you want to exclude.
Where-Object { ( $_.Mail -replace '^[^#]+') -notin '#abc.com','#xyz.com','#foo.bar' }

Answer 2

for multiple conditions use full syntax:
where-object { $_.property -eq $b -and $_.otherproperty -match $a }

Answer 3

You're missing some brackets around your where-clause:
where {objectClass -eq 'user'}
And this:
where {mail -notmatch "#abc.com" -or "#xyz.com"}
Should look like that:
where {mail -notmatch "#abc.com" -or mail -notmatch "#xyz.com"}
Please rethink the logic of your second where since it will always be true.