Hi,
we´re thinking about a Domino Domain consolidation (10 Domino domains into 1 domino Domain - all sister companies)
I would like to know if it is wise to have 10 or more organizational certifiers in one domain, or if we should go for one root organization with different OU´s
so
user/country/company1
user/country/company2
(we would not need to recertify the users)
or
user/country/company1/organization
user/country/company2/organization
(recertification is required)
i think both ways are possible, but which one is better? 
our environment is 6.5.2 (server+client)
thanks for your feedback
Herbert