PostFix Issue!! Need help ASAP

I searched for this but cannot find anything on it and I need this help kinda fast.

I need to figure out how to use wildcards for domain e-mail forwarding. Example:
In my virtual file I have the following:

@iam.hiddendomain.com craig@hiddendomain.com
@ams.hiddendomain.com craig@hiddendomain.com

This works fine. I can send email from test@hiddendomain.com to test@ams.hiddendomain.com and it forwards fine to craig@hiddendomain.com. The issue comes when I don't want to use a subdomain and it looks like this:

@hiddendomain.com craig@hiddendomain.com
@iam.hiddendomain.com craig@hiddendomain.com
@ams.hiddendomain.com craig@hiddendomain.com

When its like this I get Recipient address rejected: User unknown in virtual address table.

Here is my config:

mail_owner = postfix
mydomain = efthiddendomain.com
#myorigin =
inet_interfaces = all
inet_protocols = all
mydestination =
local_recipient_maps =
unknown_local_recipient_reject_code = 550
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
header_checks = regexp:/apps/$multi_instance_name/header_checks
debug_peer_level = 2
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
relayhost = mxtest
virtual_alias_domains = ams.hiddendomain.com iam.hiddendomain.com
#virtual_alias_domains = ams.hiddendomain.com iam.hiddendomain.com hiddendomain.com
virtual_alias_maps = hash:/apps/$multi_instance_name/virtual

smtpd_client_restrictions =
permit_sasl_authenticated
check_client_access hash:/apps/$multi_instance_name/access
reject_non_fqdn_helo_hostname
reject_unauth_pipelining
reject_invalid_helo_hostname

Sender restrictions:
smtpd_sender_restrictions =
permit_mynetworks,
reject_non_fqdn_sender,
reject_unknown_sender_domain,
permit

disable_vrfy_command = yes
smtpd_delay_reject = yes
smtpd_helo_required = yes
multi_instance_directories = /apps/postfix-iam-12c
multi_instance_enable = yes
master_service_disable =
authorized_submit_users =
#multi_instance_group = etsprod
multi_instance_name = postfix-iam-12c
message_size_limit = 25250000

Essentially all I am trying to do is work with one domain really. I just need hiddendomain.com and in the virtual I need anything coming into hiddendomain.com to forward to an exchange mailbox.
So when anything like (henry@hiddendomain.com) comes to the server in the virtual file it will see: @hiddendomain.com someexchangemailbox@hiddendomain.com and foward it fine. Only works fine using a sub domain which is weird.

Need some help experts!
Thank you!