The UM Partner Message Assistant failed to deliver message '%1' for the mailbox '%2' because the Microsoft Exchange Unified Messaging service isn't available. Additional information: %3
The UM IP gateway or host "%1" resolves to an invalid FQDN. Please check your UM IP gateway and DNS server configuration. ...
The UM mailbox policy assigned to the mailbox in the source forest couldn't be mapped to a UM mailbox policy in the target ...
The UM mailbox policy with ID '{0}' assigned to user '{1}' wasn't found. If the policy was created recently, this may have ...
The UM mailbox with Identity '{0}' is a legacy mailbox. You need to run this command from a Windows PowerShell window that's ...
The UM Partner Message Assistant failed to deliver message '%1' for the mailbox '%2' because the Microsoft Exchange Unified ...
The UM Partner Message Assistant failed to process a message. This is a permanent error. The message will not be delivered. ...
The UM worker process (UMWorkerProcess.exe) encountered an unhandled exception "%1" during an incoming call with ID "%2". ...
The UMCallingLineId '{0}' isn't valid because it's not unique. Another recipient, '{1}', has the same value in their UMCallingLineId ...
The Unified Messaging (UM) server failed to process messages for user "%1" during the call with ID "%2" because the user ...