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When setting automatic replies (Out of Office) via Exchange 2013 OWA on behalf of another user, the message in the title can be displayed when saving the text. If you look at the System Event Log on the Exchange Server, you may see the following event ID 4: Current user: '" (domain)/(OU)/(OU)/(administrator) " on behalf of " (domain)/(OU)/(OU)/(User) "' Request for URL ( long URL follows ) failed with the following error: Microsoft.Exchange.Management.ControlPanel.RegionalSettingsNotConfiguredException: We couldn't process the request because the user ' (domain)/(OU)/(OU)/(User) ' hasn't signed in to Outlook Web App and selected a language and a time zone. Ask the user to do this, or, if you are a member of the built-in Organization Management or Help Desk role group, you can use Window PowerShell to select a language and time zone for them. Cancel the Automatic Replies dialog and switch to Settings, which will display a Time Zone selecti...