Usando get ADServiceAccount, há um atributo para hostComputers:
Get-ADServiceAccount -Filter {HostComputers -eq "CN=SQL-Server-1, DC=contoso,DC=com" }
Enabled : True Name : service1
UserPrincipalName :
SamAccountName : service1$
ObjectClass : msDS-ManagedServiceAccount
SID : S-1-5-21-159507390-2980359153-3438059098-29770
ObjectGUID : eaa435ee-6ebc-44dd-b4b6-dc1bb5bcd23a
HostComputers : {CN=SQL-Server-1, DC=contoso,DC=com}
DistinguishedName : CN=service1,CN=Managed Service Accounts,DC=contoso,DC=com
Ref: link