(&(!(mail=bill.nolte@we-energies.com))(!(mail=Bill.Jurgens@we-energies.com))(!(mail=Ronald.Keller@we-energies.com))(!(mail=Calvin.Formolo@we-energies.com))(!(givenName=Room))(!(givenName=Resource))(!(sn=Pager))(!(givenName=Room))(!(cn=install*))(!(cn=qa*))(!(cn=evaltest*))(!(cn=7install*)))

(&(!(mail=BLucius@cobank.com))(!(mail=CFjelstul@cobank.com))(!(employeeNumber=svc))(!(msExchResourceSearchProperties=Room))(!(msExchResourceDisplay=Room))(!(displayName=Pager*))(!(givenName=Room)))


Only People or User accounts.. 
(&(objectCategory=person)(objectClass=user)(sAMAccountName=*)(givenName=*)(sn=*)(mail=*)) 

(&(sAMAccountType=805306368)(sAMAccountName=*)(givenName=*)(sn=*)(mail=*)) 
(sAMAccountType=805306368) = User Object.


ONly in specific groups.. 
(&(OU=StdUsers)(OU=UsersAndGroups)(OU=Accounts)(objectCategory=person)(objectClass=user)(sAMAccountName=*)(givenName=*)(sn=*)(mail=*))