This one-liner exports all group managed Service Accounts (gMSA) from an Active Directory Domain into a .csv file.
As follows, you will find the command as I used it to export certain information about those gMSA in my Domain. You might have to adjust it to your specific needs.
1 2 3 4 5 6 7 8 9 | Get-ADServiceAccount -Filter * -Properties * | ` Select -Property Name, ` @{name="Owner"; expression={(Get-Acl "AD:\$($_.DistinguishedName)").Owner}}, ` Enabled, LockedOut, Description, @{name="LastLogonDate"; expression={ $_.LastLogonDate.toString("dd.MM.yyyy") }}, ` @{name="PasswordLastSet"; expression={ $_.PasswordLastSet.toString("dd.MM.yyyy") }}, ` DistinguishedName | ` Export-Csv -Path ".\GroupManagedServiceAccounts_$((Get-ADDomain).Name).csv" ` -NoTypeInformation -Encoding UTF8 |