One or more servers in the existing organization are running Exchange 2000 Server or Exchange Server 2003. Installation can't proceed until all Exchange 2000 or Exchange 2003 servers are removed.
One or more messages in the 'Messages awaiting directory lookup' queue on server {1} are addressed to the mailbox store '{3}' ...
One or more of the following mailbox policy settings failed to validate: Unified Messaging, Messaging Records Management ...
One or more of these parameters: Administrative Group, Routing Group, Administrative Group containing Routing Group, Install ...
One or more organization message size restrictions that are used by Exchange 2010 conflict with the corresponding settings ...
One or more servers in the existing organization are running Exchange 2000 Server or Exchange Server 2003. Installation can't ...
One or more servers running Exchange 2010 or later exist in your organization. You can't change the Customer Experience Improvement ...
One or more subscriptions in the request reside on another Client Access server. GetStreamingEvents won't proxy in the event ...
One or more UserId parameters are invalid. Make sure that the PrimarySmtpAddress, Sid and DisplayName properties refer to ...
One or more users are currently instant messaging enabled on this server. These users must be moved to a different Instant ...