What is Autodiscover URL in Exchange?

What is Autodiscover URL in Exchange?

The Autodiscover service minimizes user configuration and deployment steps by providing clients access to Exchange features. For Exchange Web Services (EWS) clients, Autodiscover is typically used to find the EWS endpoint URL.

What protocol does autodiscover use?

The Autodiscover HTTP Service Protocol provides a way for Autodiscover clients to find Autodiscover servers. This protocol extends the Domain Name System (DNS) and directory services to make the location and settings of mail servers available to clients.

Does Exchange 2019 support RPC over HTTP?

Features no longer available in Exchange Server 2019 Also, users can use client access protocols like RPC over HTTP (Outlook Anywhere) or MAPI over HTTP. The Unified Messaging (UM) feature is discontinued in Exchange Server 2019.

Should I enable MAPI over HTTP?

Benefits of MAPI over HTTP MAPI over HTTP offers the following benefits to the clients that support it: Enables future innovation in authentication by using an HTTP based protocol. Provides faster reconnection times after a communications break because only TCP connections (not RPC connections) need to be rebuilt.

How does autodiscover work in Exchange?

Introduced in Exchange Server 2007, the primary purpose of the Exchange Autodiscover service is to establish initial connections to Exchange user mailboxes. Once that connection has been made, it also helps Outlook access Exchange Server features such as the offline address book and unified messaging.

How do I check my Exchange Autodiscover?

Holding down CTRL, right click on the Outlook icon in your system tray. This will give you a few additional options including “Test Email AutoConfiguration…”. In the window that appears enter a set of valid credentials, make sure to leave only “Use Autodiscover” selected and click “Test”.

How do I find Autodiscover URL?

Find autodiscover URL with PowerShell Get the configured autodiscover URL on the Exchange Servers. Run Exchange Management Shell as administrator and run the Get-ClientAccessServer cmdlet. The output will show all the Exchange Servers, including the autodiscover URL (AutoDiscoverServiceInternalUri). That’s it!

What is MAPI HTTP?

MAPI over HTTP is the default transport protocol to connect clients to Microsoft Exchange and Exchange Online. The Messaging Application Programming Interface (MAPI) over Hypertext Transfer Protocol (HTTP) supersedes the Remote Procedure Call (RPC) over HTTP protocol, which is also known as Outlook Anywhere.

What is the difference between RPC over HTTP and MAPI over HTTP?

How do I know if I have MAPI over HTTP?

You can test the end-to-end MAPI over HTTP connection by using the Test-OutlookConnectivity cmdlet….Logs for MAPI over HTTP activity are at the following locations:

  1. %ExchangeInstallPath%Logging\MAPI Address Book Service\
  2. %ExchangeInstallPath%Logging\MAPI Client Access\
  3. %ExchangeInstallPath%Logging\HttpProxy\Mapi\

How do I know if Exchange Autodiscover is working?

How do I view Autodiscover XML?

You can use the Test E-mail AutoConfiguration option in Outlook or the AutoDiscover tests in Microsoft Remote Connectivity Analyzer to retrieve the AutoDiscover response. The good news is you can also use a PowerShell one-liner or function to retrieve it.

Where can I find Autodiscover XML?

The ‘Autodiscover. xml’ file will only be present in the root folder of the local hard drive if the OLSetupv5.exe utility was used from the Online Control Panel to configure Outlook with the Exchange Server.

How do I view Autodiscover xml?

How do I enable MAPI over HTTP?

To enable or disable MAPI over HTTP at the organizational level, use the Set-OrganizationConfig cmdlet with the MapiHttpEnabled parameter. Valid values are: $true: MAPI over HTTP connections are allowed for all mailboxes in the organization (unless MAPI over HTTP is disabled on a specific mailbox).

What is a MAPI client?

MAPI is a client protocol that lets users access their mailbox by using Outlook or other MAPI email clients. By default, MAPI access to a user mailbox is enabled. Disabling MAPI access to a mailbox prevents the user from using Outlook to access their mailbox in Exchange mode.


RPC protocol uses TCP as an underlying protocol and HTTP again uses TCP as an underlying protocol.

How is RPC accomplished with HTTP?

The Microsoft RPC-over-HTTP implementation (RPC over HTTP) allows RPC clients to securely and efficiently connect across the Internet to RPC server programs and execute remote procedure calls. This is accomplished with the help of an intermediary known as the RPC-over-HTTP Proxy, or simply the RPC Proxy.

What is Autodiscover protocol in Exchange Server?

For example, Autodiscover protocol enables Exchange client to locate available Exchange CAS server automatically, but some of the Exchange clients such as the OWA client specifies manually the name of the Exchange server whom they access, instead of using an “automatic process” that will reveal at the end the required Exchange CAS server name.

What is Autodiscover and how do I use it?

For Exchange Web Services (EWS) clients, Autodiscover is typically used to find the EWS endpoint URL, but Autodiscover can also provide information to configure clients that use other protocols. Autodiscover works for client applications that are inside or outside firewalls and will work in resource forest and multiple forest scenarios.

What HTTP headers are optional when sending Autodiscover requests?

The following HTTP headers are optional when sending Autodiscover requests. Table 1. HTTP request headers If present and set to “1”, indicates that the client is requesting information that can be used to connect to the server by using the MAPI/HTTP protocol. This header is applicable to clients that implement the MAPI/HTTP protocol.

Is outlook dependent on the Exchange Autodiscover infrastructure?

The Outlook client is entirely dependent on the Exchange Autodiscover infrastructure. Another Exchange client such as – mobile client (ActiveSync) and OWA (web client) are partially reliant on the Exchange Autodiscover infrastructure.