Under the Microsoft Office Outlook Connectivity Tests heading choose: Outlook. Telnet to 110 or 995 gets a similar error - "connection closed by remote host" immediately. Scroll past the blue Support and Recovery Assistant window if it appears. Put the Autodiscover Domain as the Hostname. Enable Exchange HTTP Protocol (EXPR) as an Outlook Provider. The test will tell you if it has passed or failed. You can then click the Perform Test link to run through the required connectivity checks. Enable Autodiscover on the Exchange Server. Make sure you choose Calendar in the Test predefined folder option. : An existing connection was forcibly closed by the This will be a step-by-step guide in the following order: Test the Exchange Server Connection. System.IO.IOException: Unable to read data from the transport connection: An existingĬonnection was forcibly closed by the remote host. This will be used when configuring Exchange connectivity in Threat Response. Unable to read data from the transport connection: An existing connection was forciblyĬlosed by the remote host.Server response while making connection. Make note of the Exchange Web Services URL for now. when I run test-popconnectivity I get the following: IMAP works but the application I am trying to repair can only utilize POP3. The Test Account value is used to verify the Service Account has the appropriate permissions configured. Correct any errors found.Not sure why but POP3 is no longer functioning on our Exchange server, it closes the connection as soon as it's established. Microsoft Exchange Connections- Graph API. Verify that all URLs on the Exchange server for the OAB and Autodiscover mechanisms are configured correctly. Make sure all services return Success/Information responses. If all users are simultaneously complaining about a problem connecting to Exchange from Outlook, run the following commands in the Exchange Management Shell on a Microsoft Exchange Server with the CAS (Client Access Server) role: Test-OutlookWebServices –ClientAccessServer |ft Restart your computer and set up a new Outlook profile.Specify the FQDN of your domain controller with the Global Catalog role as the parameter value.Running the cmdlet on a Client Access server will test the local server. The mailbox can either be the test user mailbox you created earlier, or a specific mailbox user. Add a new REG_SZ parameter named DS Server If your account meets all the requirements, but it still fails to connect to Spark, we are happy to help you personally. The Test-ActiveSyncConnectivity cmdlet allows you to simulate an Exchange ActiveSync connection from a mobile device to a mailbox.If you are using Microsoft Exchange that is not needed. Go to the following registry key HKEY_CURRENT_USER\Software\Microsoft\Exchange\Exchange Provider (if this branch is missing, create it manually) Solution: This is an issue with Microsofts remote connectivity analyzer.Open the Registry Editor (regedit.exe).If the computer on which you are configuring Outlook to Exchange connectivity is in one AD site, and the Exchange Server and the Global Catalog domain controller are in a different site, you must create a custom registry key on the client. It tests connectivity using both the RPC over HTTP and the MAPI over HTTP protocols. This test walks through the steps Outlook uses to connect via the Internet. Select Exchange Server > Outlook Connectivity, enter your email address on the Exchange server, username and password, enter captcha, and click Perform Test. If you are setting up an Outlook connection to your published Exchange over Internet (client traffic comes to the corporate network from outside), you can check the correctness of the DNS settings, Autodiscover, and Exchange availability from the outside using the service.