The name cannot be resolved, the connection to Microsoft Exchange is unavailable (Outlook 2010 client)
How to fix Outlook to The connection to Microsoft exchange is unavailable. Outlook must be online or connected to complete this action- Internal connect
![Outlook client can't connect to Exchange 2016 – continually prompts for login credentials | Shane Jackson IT Pro Outlook client can't connect to Exchange 2016 – continually prompts for login credentials | Shane Jackson IT Pro](https://shanejacksonitpro.com/wp-content/uploads/2018/02/loginprompt1.png)