![]() If you successfully connected to the account. If there is a problem with the connection, the indicator icon will be orange. Look at the Exchange account in the left pane. Solution: Check your Microsoft Exchange server connection. More Informationįor more information about SSL/TLS Renegotiation, please review this TechNet blog post. Cause: The server that is running Microsoft Exchange Server is unavailable. Enable Windows Authentication -NTLM, Negotiate and Basic. As a workaround, try to edit the authentication settings for the mapi virtual directory in the Exchange Admin center. FWIW: All Outlook versions only provide backwards compatibility support for up to 2 previous generations of Exchange. Please use the Microsoft Remote Connectivity Analyzer to run outlook connectivity tests and check if any errors. The released version of Outlook 2016 will no longer support Exchange 2007 and that change has now also been applied to the Preview release. ![]() NoteDo not configure the server to use Strict mode, as this prevents the Outlook for Mac client from connecting to the Exchange server. There also was an update for the Office 2016 Preview rolled out. External connections to Exchange Server may be blocked if this server is in Strict mode. If you are using a security product such as Microsoft Forefront Threat Management Gateway (TMG) for managing connections to Exchange Server from outside your company, you will need to configure your TMG server using KB article 980436. This method allows Outlook for Mac to connect to the server even when SSL 2.0 and 3.0 are blocked. This allows the Outlook for Mac client to establish a connection by using the SSL protocol and then renegotiate by using TLS. ![]() WorkaroundĬonfigure the Exchange server to support Compatible mode by using the instructions from KB article 980436. ![]() When SSL is disabled and secure renegotiation is implemented as defined in RFC 5746, Outlook requires the server to be in Compatible mode so that the session can be renegotiated from SSL to Transport Layer Security (TLS). The connection failure occurs because Outlook for Mac uses SSL to establish communication with an Exchange server. You cannot connect to a server that is running Microsoft Exchange Server from a Microsoft Outlook 2016 for Mac or Outlook for Mac 2011 client after disabling Secure Sockets Layer (SSL) on the server. Outlook 2016 for Mac Outlook for Mac for Office 365 More.
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