Microsoft Outlook Requirements for the Exchange Mailbox for On-Premises Exchange Servers

Applies to: User Mailbox

These steps are not required when you use EWS. For more information, see Using Exchange Web Services in an On-Premises Environment.

Microsoft Outlook 64-bit installation, 2010, or 2013.


Microsoft Outlook 2016 is not supported.


  • You must install Microsoft Outlook on the access node. The Microsoft Outlook license is not required.

  • Use only the traditional Windows Installer-based (MSI) method to install Microsoft Office. Other methods, such as Click-to-Run, are not supported.

  • Make sure that NTLM authentication in enabled.

  • If you use Exchange 2016 or Exchange 2013, you must install Microsoft Outlook 2013 SP1 or later service packs.