Get-mailbox where e-mail does not containt spesific domain

Hi all,

Wondering if anyone could help me with the following:

Would like to get all mailboxes that does not have *@domain.com as e-mail (default or alias) and export it to csv file.

Get-Mailbox -ResultSize Unlimited | Where-Object {($_.SMTPAddress -notcontains "*@domain.com*")} |export-csv C:\Scripts\mailboxes.csv

Tried the above but did not work.

Thanks!

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