A problem while validating the state of active directory Web cam italiana chat
[11/12/2014 .0223]  [REQUIRED] Setup encountered a problem while validating the state of Active Directory: Couldn't find the Enterprise Organization container.
See the Exchange setup log for more information on this error. Ad Init Error [11/12/2014 .0238]  Ending processing test-Setup Prerequisites This problem can occur when installing Exchange Server 2013 into an Active Directory forest that previously contained an Exchange organization.
If necessary, run the command-line script ptlasst in MIDTIER mode to configure the Oracle Internet Directory connection parameters: -mode MIDTIER -type OIDUse the Schema portlet to create a new schema that can be assigned to users.
The solution is to re-run setup for the previous version of Exchange to prepare Active Directory again.
There is no need to fully install a server, simply preparing Active Directory should be enough.
After removal, the Microsoft Exchange System Objects container is still visible in Active Directory Users & Computers (select View - Advanced Features to see it), with the Exchange Install Domain Servers group still present.
The Microsoft Exchange Security Groups container is also still visible in Active Directory Users & Computers, with the Exchange Trusted Subsystem group the only group left behind (all other groups normally seen here have been removed by the uninstall process). The simplest execution of Exchange Server 2013 setup is to prepare the schema.
Paul is a co-author of Office 365 for IT Pros and several other books, and is also a Pluralsight author.