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A few colleges asked me the following question: “Is a Multiple Active Directory Domains In a Single Forest Is Required Today?”.
Due the fact that is no official answer exits, I would try to provide a few guidelines that would help you to obtain the correct answer to your enterprise.
The main (please note: main) benefits to use Multiple Active Directory Domains In a Single Forest Is Required Today from my perspective are:
A.The domain Scalability / Limitation doesn’t answer for you enterprise needs:
Maximum Number of Objects
Maximum Number of Security Identifiers
Maximum Number of entries in Discretionary and Security Access Control Lists
Group Memberships for Security Principals
FQDN Length Limitations
File Name and Path Length Limitations
Additional Name Length Limitations
Maximum Number of GPOs Applied
Trust Limitations
Maximum Number of Accounts per LDAP Transaction
Recommended Maximum Number of Users in a Group
Recommended Maximum Number of Domains in a Forest
Recommended Maximum Number of Domain Controllers in a Domain
Recommended Maximum Kerberos Settings
RedMor Taken from the site&Blog of Thanks Yuval Sinay
