Outlook 2016 does not connect to Exchange 2007, as Outlook 2016 requires technology (e.g. Outlook 2016 will not connect to Exchange Server 2007 Outlook no longer uses foreground network calls to ensure that Outlook stays responsive on unreliable networks. You can read more about this architecture change and what it means for you by checking out this EHLO blog from last year. First introduced in Exchange 2013 SP1 and Outlook 2013 SP1, MAPI-HTTP has replaced the RPC-based sync with a new Internet-friendly protocol that enhances Exchange/Outlook connectivity. More information can be found here: Account Auto Configuration process (Autodiscover). If you have not yet configured AutoDiscover, you will need to do this prior to deploying Outlook 2016. Outlook 2016 retrieves Exchange connectivity settings directly from AutoDiscover instead of the registry, making profiles more reliable, but that also makes AutoDiscover a required feature. AutoDiscover must be configured or Outlook 2016 will be unable to connect to Exchange Server. Over the past two releases, we’ve also made significant changes to how Outlook connects to and sync mail from Exchange, including: We’ve reduced the amount of time it takes to download messages, display the message list, and show new email after resuming from hibernation. Today we want to take a closer look at some changes in Outlook 2016 that matter to Exchange administrators, to help you plan your organization’s deployment: MAPI-HTTP and AutodiscoverĪs with all Outlook releases, this one comes with several updates to improve performance and reduce the common issues users face connecting to their accounts and syncing mail. Hopefully you’ve seen already seen some of what’s new in Outlook 2016 for end users – if not, here’s a quick overview. The log emitted in the steam is: S: * OK The Microsoft Exchange IMAP4 service is ready.At the end of September, we released Office 2016, which includes a new version of the Outlook desktop client. The exception thrown is AuthenticationException with message LOGIN failed.
I tried with and without the line ("XOAUTH2"). Var uids = await inbox.SearchAsync(SearchQuery.NotSeen) Using (var client = new (logger))Ĭlient.Connect("", 993, inbox = client.Inbox Var logger = new ProtocolLogger(stream, false) This is my code: var stream = new MemoryStream() I can log into with the username and password, and go to Outlook there and see the mailbox, but I can't for the life of me get this to work in my code. However, for one customer now it does not work.
For a lot of customers, we connect to the Office 365 Outlook IMAP server, and that works just fine.
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