What is Outlook Anywhere RPC over HTTP?

RPC over HTTP, also known as Outlook Anywhere, is a legacy method of connectivity and transport between Outlook for Windows and Exchange. Starting on October 31, 2017, RPC over HTTP will no longer be a supported protocol for accessing mail data from Exchange Online.

Does Outlook 2016 use MAPI over HTTP?

MAPI over HTTP uses two TCP connections — one long-term connection and one short-term connection — for more efficient network use and improved email performance. For email clients, organizations can use Outlook 2016, Outlook 2013 SP1 (or later), or Outlook 2010 SP2 (with KB2956191 and KB2965295 updates).

What is RPC HTTP?

RPC over HTTP (Remote Procedure Call over HTTP) is a protocol that allows a client on the Internet to connect securely to a Microsoft Exchange Server without having to log into a virtual private network (VPN) first.

How can I tell if Outlook is using MAPI over HTTP?

On the client, you can see the connection type in the Outlook connection status. To display it, Ctrl+right-click the Outlook icon in the notification area. If the MAPI over HTTP connection is active, you will see HTTP instead of RPC/HTTP displayed in the log.

Is Outlook Anywhere required for Exchange 2016?

Must I enable Outlook Anywhere ? Yes. Exchange 2013 and Exchange 2016 only support MAPI\HTTPS or Outlook Anywhere (RPC\HTTPS).

Is MAPI over HTTP enabled?

MAPI over HTTP when upgrading Exchange In Exchange 2016 or later, MAPI over HTTP is enabled by default at the organization level, although you still need to configure the virtual directories as described in Configure MAPI over HTTP for users to take advantage of it.

Is RPC an HTTP?

RPC does not require HTTP. Basically, RPC describes any mechanism that is suitable to invoke some piece of code remotely. The transport mechanism used to perform the RPC could be SOAP over HTTP. It could also be a REST call returning some JSON data over HTTP.

Where is RPC used?

The RPC interface is generally used to communicate between processes on different workstations in a network. However, RPC works just as well for communication between different processes on the same workstation. The Port Mapper program maps RPC program and version numbers to a transport-specific port number.

How do I know if my outlook is MAPI?

To verify that you’ve successfully enabled or disabled MAPI for a user mailbox, do one of the following:

1. In the EAC, navigate to Recipients > Mailboxes, click the mailbox, and then click Edit .
2. On the mailbox properties page, click Mailbox Features.
3. Under Email Connectivity, verify whether MAPI is enabled or disabled.

Does Outlook use SMTP?

SMTP is used to send mail. The SMTP configuration parameters for Outlook.com are: Server: smtp-mail.outlook.com. Port: 25 (or 587 if 25 is blocked)

How do I disable Outlook Anywhere in Exchange 2016?

If you want to disable external Outlook Anywhere for all users, you can just cancel publish Outlook Anywhere to internet. In Exchange 2016, MAPI over HTTP is the default protocol. If you are using previous versions of Outlook client such as Outlook 2007/2010, it will use outlook anywhere.

What’s the difference between RPC and HTTP in Outlook 2016?

This is because Microsoft has replaced RPC/HTTP with MAPI/HTTP to enhance the speed of the connection. This post will explain how to configure Outlook 2016 to use the older RPC/HTTP for connecting to an Exchange 2010 Server.

Is the exchange 2016 sitll supporting RPC over HTTP?

Yes, Exchange 2016 sitll supports RPC over Http. 1. Check if you can reslove the outlook anywhere external host name to your pubilc IP. 2. Make sure the installed certificate includes the name you have configured for outlook anywhere. Please remember to mark the replies as answers.

Is the RPC over HTTP protocol being replaced?

RPC over HTTP is being replaced by MAPI over HTTP, a modern protocol that was launched in May 2014. This change affects you if you’re running Outlook 2007 because Outlook 2007 won’t work with MAPI over HTTP. To avoid being in an unsupported state, Outlook 2007 customers have to update to a newer version of Outlook or use Outlook on the web.

Can you use RPC over HTTP in Office 365?

No. Customers who use RPC over HTTP to connect Outlook for Windows and on-premises Exchange Server continue to do so. This change affects only customers who use Outlook for Windows to connect to Exchange Online mailboxes in Office 365. For more information about MAPI over HTTP, see the following resources: