The name cannot be resolved, the connection to Microsoft Exchange is unavailable (Outlook 2010 client)
![Outlook connection issues with Exchange mailboxes because of the RPC encryption requirement - Exchange | Microsoft Learn Outlook connection issues with Exchange mailboxes because of the RPC encryption requirement - Exchange | Microsoft Learn](https://learn.microsoft.com/en-us/exchange/troubleshoot/exchangeserver/client-connectivity/media/outlook-connection-issue-caused-by-rpc-encryption-requirement/select-exchange-node-2010.png)
Outlook connection issues with Exchange mailboxes because of the RPC encryption requirement - Exchange | Microsoft Learn
Exchange 2010 - Outlook 2010: The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action
![Outlook connection issues with Exchange mailboxes because of the RPC encryption requirement - Exchange | Microsoft Learn Outlook connection issues with Exchange mailboxes because of the RPC encryption requirement - Exchange | Microsoft Learn](https://learn.microsoft.com/en-us/exchange/troubleshoot/exchangeserver/client-connectivity/media/outlook-connection-issue-caused-by-rpc-encryption-requirement/exchange-encryption.png)