Unable to install Exchange 2016. This happens during 'Hybrid Deployment Check' step, it fails with the below error (copied from ExchangeSetup.log).
Error: System.TypeLoadException: Could not load type 'Blackbaud.WebServices.Common.Logging.Log' from assembly 'Blackbaud.WebServices.Common.
Our scenario is an existing Exchange 2010 SP3 CU15 Hybrid environment (Office 365) with most mailboxes in O365 and a few on premise ones. Following Exchange Server Deployment Assistant to perform GUI installation on a clean Window Server 2016 OS. I'm unable to continue with our upgrade, please help. Thank you, Jaans Extract from ExchangeSetup.log 14: 0 Starting hybrid configuration checks. 14: 0 Running the Office 365 tenant hybrid test.
14: 0 The hybrid detection engine will try to connect to Office 365 using the provided tenant credentials to run the Get-OrganizationConfig cmdlet. 14: 0 Opening runspace to 14: 0 Session=Tenant Cmdlet=Get-OrganizationConfig START 14: 0 Session=Tenant Cmdlet=Get-OrganizationConfig FINISH Time=406.2691ms 14: 0 Session=Tenant Total Cmdlet Time=0.4062691s 14: 0 Microsoft.Exchange.Management.Deployment.HybridConfigurationDetection.HybridConfigurationDetectionException: Could not load type 'Microsoft.Exchange.Data.SubscribedPlanDetails' from assembly 'Microsoft.Exchange.Data, Version=15.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. System.TypeLoadException: Could not load type 'Microsoft.Exchange.Data.SubscribedPlanDetails' from assembly 'Microsoft.Exchange.Data, Version=15.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.