![Outlook 2013 and Exchange 2016 "The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action" - Server Fault Outlook 2013 and Exchange 2016 "The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action" - Server Fault](https://i.stack.imgur.com/lbXRh.png)
Outlook 2013 and Exchange 2016 "The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action" - Server Fault
![Exchange 2013/2016 – Outlook cannot connect to Exchange server with MAPI over HTTP only internal. | Exchange-Fix Exchange 2013/2016 – Outlook cannot connect to Exchange server with MAPI over HTTP only internal. | Exchange-Fix](https://anotherexchangeblog.files.wordpress.com/2017/10/capture1-redone.jpg)
Exchange 2013/2016 – Outlook cannot connect to Exchange server with MAPI over HTTP only internal. | Exchange-Fix
![Outlook Web App 2013 and its morphing user interface | ITPro Today: IT News, How-Tos, Trends, Case Studies, Career Tips, More Outlook Web App 2013 and its morphing user interface | ITPro Today: IT News, How-Tos, Trends, Case Studies, Career Tips, More](https://www.itprotoday.com/sites/itprotoday.com/files/styles/article_featured_retina/public/uploads/2013/04/exchage2013_0_0.jpg?itok=HtUoG0hu)
Outlook Web App 2013 and its morphing user interface | ITPro Today: IT News, How-Tos, Trends, Case Studies, Career Tips, More
![Exchange Server 2013 or 2016 redirects to Exchange 2010 for OWA, Outlook on the web, and ECP - Exchange | Microsoft Docs Exchange Server 2013 or 2016 redirects to Exchange 2010 for OWA, Outlook on the web, and ECP - Exchange | Microsoft Docs](https://docs.microsoft.com/en-us/exchange/troubleshoot/exchangeserver/client-connectivity/media/exchange-server-2013-2016-redirect-to-2010-owa-ecp/application-pools.png)