Open Command Prompt in your PC as an administrator.To resolve this, you can run flushdns command to clear cache and fix the error. ĭNS cache could also lead to such Exchange connectivity issues. This should ideally fix the Exchange server is unavailable or Outlook server unavailable error. Under ‘ Exceptions’ enter your mail server address, For instance,.Under Connections tab, click on LAN settings.In Windows PC, search for “Internet Options” and open it.Visit Remote Connectivity kit to check and analyze Exchange server connectivity issue. Use Network troubleshooter in Windows to fix the network connection issues. Check your wireless adapter or LAN cable. Solution 1: Check Network and Connectivity Įnsure break-free internet connectivity. If so, you may use Stellar Repair for Exchange to restore the mailboxes and fix the Exchange connectivity issue. In such a case, you should check the status of the database, if it’s mounted/unmounted or disabled. IMPORTANT NOTE: If the error is experienced by other Exchange account users also, it indicates a problem with the Exchange server. Solutions to Fix the “Exchange Server is unavailable” Errorīased on the Outlook version, following are some solutions that you can apply to fix the Exchange connectivity issue. Or Exchange server is not available or down Conflict with third-party software such as antivirus.There can be several reasons that may cause this Exchange error, such as, ‘The connection to the microsoft exchange server is unavailable’ is a fairly common error and isn’t version-specific. What Causes ‘Exchange Server is unavailable’ Error? outlook must be online or connected), know the causes that result in this error. Nonetheless, before going through the different methods that you can use to fix the issue (the connection to the microsoft exchange server is unavailable.

Thus, it becomes a necessity to fix this error as soon as possible. When this error comes up, you cannot access your mailbox and mailbox items stored on the Exchange server. The error may also appear when you try to access the Exchange account via MS Outlook in Office 365.

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