Hi All,I was recently on a customer’s site and was trying to prepare the schema for an installation of Exchange 2013 SP1 this summer. The client currently use a hybrid setup with on premise Exchange 2010 SP3 and Office 365.I downloaded the Exchange 2013 media, logged on to the DC with the schema master role and began to run the following command:-Setup.exe /PrepareSchema /IAcceptExchangeServerLicenseTermsIt instantly failed and threw this error… Performing Microsoft Exchange Server Prerequisite Check Prerequisite Analysis FAILEDA hybrid deployment with Office 365 has been detected. Please ensure that you are running setup with the /TenantOrganizationConfig switch. To use the TenantOrganizationConfig switch you must first connect to your Exchange Online tenant via PowerShell and execute the following command: “Get-OrganizationConfig | Export-Clixml -Path MyTenantOrganizationConfig.XML”. Once the XML file has been generated, run setup with the TenantOrganizationConfig switch as follows “/TenantOrganizationConfig myTenantOrganizationConfig.XML”.SolutionIt turns out that there is very specific syntax to use when combining /PrepareSchema and /TenantOrganizationConfig. I will bullet-point the process so it’s easier to follow:-I opened up PowerShell and ran the following commands to download a copy of the XML file Setup.exe was requesting:-Get Credentials $UserCredential = Get-Credential(at this point enter credentials for your Office 365 Global Admin account)Connect to Office 365 $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell/ -Credential $LiveCred -Authentication Basic -AllowRedirectionImport PowerShell SessionImport-PSSession $SessionDownload Hybrid XML File Get-OrganizationConfig | Export-Clixml -Path C:\MyTenantOrganizationConfig.XMLBlog PicMove the XML File Move MyTenantOrganizationConfig.XML file from C:\ of local computer to C:\ of the server you are running Setup.exe fromRe-run Setup Setup /PrepareAD /IAcceptExchangeServerLicenseTerms /TenantOrganizationConfig:C:\MyTenantOrganizationConfig.XML You should now have an extended AD schema ready for Exchange 2013!Hope this helps. Neil