Today we are announcing the availability of quarterly Cumulative Updates (CUs) for Exchange Server 2016 and Exchange Server 2019. These CUs include fixes for customer reported issues, all previously ...
Updated Jun 29, 2021
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/prepareschema worked fine
The problem is with /prepared and in the MSExchangeManagement Log I find these entries (event 6):
Cmdlet failed. Cmdlet Remove-ServiceEndpoint, parameters -DomainController "dc1.mydomain.local" -Identity "Windows Live Calendar".
Cmdlet failed. Cmdlet initialize-DomainPermissions, parameters -CreateTenantRoot "False" -CreateMsoSyncRoot "False" -IsManagementForest "False".
Cmdlet failed. Cmdlet Install-ExchangeOrganization, parameters -DomainController "dc1.mydomain.local" -OrganizationName "First Organization" -PrepareOrganization "True" -Industry "NotSpecified" -ActiveDirectorySplitPermissions $null -PrepareDomain "True".
This is also strange:
Microsoft.Exchange.Configuration.Tasks.ManagementObjectNotFoundException: The operation couldn't be performed because object 'Windows Live Calendar' couldn't be found on 'DC1.mydomain.local'.
BTW: Installation from Exchange 2016 CU18 to CU20 instead of 21 is successful