{"id":164281,"date":"2024-03-18T05:57:31","date_gmt":"2024-03-18T05:57:31","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=164281"},"modified":"2026-03-26T07:03:52","modified_gmt":"2026-03-26T07:03:52","slug":"fix-exchange-hybrid-configuration-wizard-error-hcw8064","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/","title":{"rendered":"Troubleshooting the Exchange Hybrid Configuration Wizard (HCW) Error HCW8064"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><?xml encoding=\"utf-8\" ?><p>When it comes to migration from Exchange Server to Exchange Online (Office 365), one of the smoothest native methods is the <a href=\"https:\/\/www.stellarinfo.com\/blog\/hybrid-migration-migrate-exchange-mailboxes-office-365\/\" target=\"_blank\" rel=\"noreferrer noopener\">hybrid migration method<\/a>. However, it is also the longest method. In the hybrid setup, both the local Exchange Server and the Exchange Online act as one. To set up and configure hybrid deployment between the local server and the Exchange Online, you need to install the Hybrid Configuration Wizard (HCW) on the Exchange Server. During the installation, the send and the receive connectors are created on both Exchange Servers. However, when the Hybrid Configuration Wizard (HCW) ends, you may get the following error message.<\/p><blockquote class=\"note_alert\">\n<p><em><strong>Read more about<\/strong> <a href=\"https:\/\/www.stellarinfo.com\/article\/testing-new-exchange-hybrid-configuration-office365.php\" target=\"_blank\" rel=\"noreferrer noopener\">Testing a New Exchange Hybrid Configuration with Office 365<\/a>.<\/em><\/p>\n<\/blockquote><p>The HCW has completed, but was not able to perform the OAuth portion of your Hybrid configuration. If you need features that rely on OAuth <a href=\"https:\/\/technet.microsoft.com\/library\/dn497703(v=exchg.150).aspx\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/technet.microsoft.com\/library\/dn497703(v=exchg.150).aspx<\/a>, you can try running the HCW again or manually configure OAuth using these manual steps <a href=\"https:\/\/technet.microsoft.com\/library\/dn594521(v=exchg.150).aspx\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">https:\/\/technet.microsoft.com\/library\/dn594521(v=exchg.150).aspx<\/a>.<\/p><p>From the message, it seems there is an issue with the Open Authorization (OAuth) configuration for the hybrid setup. The Open Authorization (OAuth) is required to migrate some of the local Exchange Server components to Exchange Online.<\/p><p>Although the Open Authorization (OAuth) will not stop migration of mailboxes, it might cause other errors while running the migration of mailboxes to Exchange Online. If you have a few mailboxes, there is no need to troubleshoot the issue since all the mailboxes will be on the cloud. However, if you have several mailboxes or you need to keep the local hybrid setup, then you need to investigate and fix the error. Let&rsquo;s see how to resolve this issue.<\/p><h2 class=\"wp-block-heading\" id=\"possible-solutions-to-resolve-the-hcw8064-error\"><strong>Possible Solutions to Resolve the HCW8064 Error<\/strong><\/h2><p>If Open Authorization (OAuth) is not configured on the Exchange Servers, then you need to configure it. It is important that the configuration must be enabled on all the nodes in the Database Availability Group (DAG). You cannot have the Open Authorization (OAuth) configured only on one local Exchange Server. This must be set up on all the servers.<\/p><p>As per the Microsoft guide, you can try to restart the Exchange Servers and re-run the Hybrid Configuration Wizard (HCW). This might help in resolving the error message.<\/p><p><strong>If this doesn&rsquo;t work, then you need to manually set the Open Authorization (OAuth). Here&rsquo;s the procedure:<\/strong><\/p><ul class=\"wp-block-list\">\n<li>On the local Exchange Servers, open the Exchange Management Shell (EMS) and run the following command.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>New-AuthServer -Name \"WindowsAzureACS\" -AuthMetadataUrl \"https:\/\/accounts.accesscontrol.windows.net\/&lt;your tenant coexistence domain&gt;\/metadata\/json\/1\"<\/code><\/code><\/pre><pre class=\"wp-block-code command_container\"><code><code>New-AuthServer -Name \"evoSTS\" -Type AzureAD -AuthMetadataUrl \"https:\/\/login.windows.net\/&lt;your tenant coexistence domain&gt;\/federationmetadata\/2007-06\/federationmetadata.xml\"<\/code><\/code><\/pre><ul class=\"wp-block-list\">\n<li>Enable the partner application on your Exchange Server for Exchange Online.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>Get-PartnerApplication |&nbsp; ?{$_.ApplicationIdentifier -eq \"00000002-0000-0ff1-ce00-000000000000\" -and $_.Realm -eq \"\"} | Set-PartnerApplication -Enabled $true<\/code><\/code><\/pre><ul class=\"wp-block-list\">\n<li>Next, you need to export the on-premises authorization certificate by saving the following code as ExportAuthCert.ps1.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>$thumbprint = (Get-AuthConfig).CurrentCertificateThumbprint<br>if((test-path $env:SYSTEMDRIVE\\OAuthConfig) -eq $false)<br>{md $env:SYSTEMDRIVE\\OAuthConfig}<br>cd $env:SYSTEMDRIVE\\OAuthConfig<br>$oAuthCert = (dir Cert:\\LocalMachine\\My) | where {$_.Thumbprint -match $thumbprint}<br>$certType = [System.Security.Cryptography.X509Certificates.X509ContentType]::Cert<br>$certBytes = $oAuthCert.Export($certType)<br>$CertFile = \"$env:SYSTEMDRIVE\\OAuthConfig\\OAuthCert.cer\"<br>[System.IO.File]::WriteAllBytes($CertFile, $certBytes)<\/code><\/code><\/pre><ul class=\"wp-block-list\">\n<li>Then, run the below script.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>.\\ExportAuthCert.ps1<\/code><\/code><\/pre><ul class=\"wp-block-list\">\n<li>Next, you need to upload the certificate to Microsoft Entra Access Control Service (ACS). You must have the MSOnline module installed. If not, you can use the following command to install it.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>Install-Module -Name MSOnline<\/code><\/code><\/pre><ul class=\"wp-block-list\">\n<li>To upload the certificates, you need to save the below code as UploadAuthCert.ps1.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>Connect-MsolService<br>$CertFile = \"$env:SYSTEMDRIVE\\OAuthConfig\\OAuthCert.cer\"<br>$objFSO = New-Object -ComObject Scripting.FileSystemObject<br>$CertFile = $objFSO.GetAbsolutePathName($CertFile)<br>$cer = New-Object System.Security.Cryptography.X509Certificates.X509Certificate<br>$cer.Import($CertFile)<br>$binCert = $cer.GetRawCertData()<br>$credValue = [System.Convert]::ToBase64String($binCert)<br>$ServiceName = \"00000002-0000-0ff1-ce00-000000000000\"<br>$p = Get-MsolServicePrincipal -ServicePrincipalName $ServiceName<br>New-MsolServicePrincipalCredential -AppPrincipalId $p.AppPrincipalId -Type asymmetric -Usage Verify -Value $credValue<\/code><\/code><\/pre><ul class=\"wp-block-list\">\n<li>Next, run the below script.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>.\\UploadAuthCert.ps1<\/code><\/code><\/pre><ul class=\"wp-block-list\">\n<li>Enter the credentials of your Exchange Online.<\/li>\n\n\n\n<li>Then, you need to register the endpoints. To get the local Exchange Server endpoints, you can use the following commands.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>Get-MapiVirtualDirectory | FL server,*url*<br>Get-WebServicesVirtualDirectory | FL server,*url*<br>Get-OABVirtualDirectory | FL server,*url*<\/code><\/code><\/pre><ul class=\"wp-block-list\">\n<li>With the above results, you need to populate a new script, called <strong>RegisterEndpoints.ps1<\/strong>, while filling the local URLs.<\/li>\n<\/ul><p><code>$ServiceName = \"00000002-0000-0ff1-ce00-000000000000\";<br>$x = Get-MsolServicePrincipal -AppPrincipalId $ServiceName;<br>$x.ServicePrincipalnames.Add(\"https:\/\/mail.mycompany.lan\/\");<br>$x.ServicePrincipalnames.Add(\"https:\/\/autodiscover.mycompany.lan\/\");<br>Set-MSOLServicePrincipal -AppPrincipalId $ServiceName -ServicePrincipalNames $x.ServicePrincipalNames;<\/code><\/p><ul class=\"wp-block-list\">\n<li>Then, run the below script.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>.\\RegisterEndPoints.ps1<\/code><\/code><\/pre><ul class=\"wp-block-list\">\n<li>Now, you need to create an <strong>IntraOrganizationConnector<\/strong> from the local organization to Microsoft 365.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>$ServiceDomain = Get-AcceptedDomain | where {$_.DomainName -like \"*.mail.onmicrosoft.com\"} | select -ExpandProperty Name<\/code><\/code><\/pre><p><code>New-IntraOrganizationConnector -name ExchangeHybridOnPremisesToOnline -DiscoveryEndpoint https:\/\/outlook.office365.com\/autodiscover\/autodiscover.svc -TargetAddressDomains $ServiceDomain<\/code><\/p><ul class=\"wp-block-list\">\n<li>Now, you need to create connection between the online and the local server by running the following command in the Exchange Online PowerShell.<\/li>\n<\/ul><pre class=\"wp-block-code command_container\"><code><code>New-IntraOrganizationConnector -name ExchangeHybridOnlineToOnPremises -DiscoveryEndpoint &lt;your on-premises Autodiscover endpoint&gt; -TargetAddressDomains &lt;your on-premises SMTP domain&gt;<\/code><\/code><\/pre><p>After this, you need to confirm that the changes are successful. For this, you can run the following command from the local Exchange Servers.<\/p><pre class=\"wp-block-code command_container\"><code><code>Test-OAuthConnectivity -Service EWS -TargetUri https:\/\/outlook.office365.com\/ews\/exchange.asmx -Mailbox &lt;On-Premises Mailbox&gt; -Verbose | Format-List<\/code><\/code><\/pre><p>Then, you need to run the below command on Exchange Online.<\/p><pre class=\"wp-block-code command_container\"><code><code>Test-OAuthConnectivity -Service EWS -TargetUri &lt;external hostname authority of your Exchange On-Premises deployment&gt;\/metadata\/json\/1 -Mailbox &lt;Exchange Online Mailbox&gt; -Verbose | Format-List<\/code><\/code><\/pre><p>If all goes well, the result should be like:<\/p><p><code>ResultType: Success&nbsp;Identity: Microsoft.Exchange.Security.OAuth.ValidationResultNodeId&nbsp;IsValid: True&nbsp;ObjectState: New<\/code><\/p><h2 class=\"wp-block-heading\" id=\"to-conclude\">To Conclude<\/h2><p>Above, we have discussed the error message <em><strong>&ldquo;The HCW has completed, but was not able to perform the OAuth portion of your Hybrid configuration&rdquo;<\/strong><\/em> that occurs when the installation of Hybrid Configuration Wizard (HCW) completes. It looks the issue is related to Open Authorization (OAuth). We have provided the step-by-step procedure to manually configure the OAuth.<\/p><p>As the hybrid approach for on-premises Exchange to Office\/Microsoft 365 migration is the longest approach and requires extensive configuration, you can explore a simpler solution to migrate data to Office 365. <strong>Stellar Migrator for Exchange<\/strong> is one such specialized <a href=\"https:\/\/www.stellarinfo.com\/exchange-migration.php\">Exchange Migration utility<\/a> that can simplify the migration process. It offers an easy-to-use interface and is compatible with any version of Exchange Server database. This tool helps to export all the data from on-premises Exchange Server database directly to Microsoft 365 tenant or another live Exchange Server database. The tool can migrate all the data from Exchange, including primary mailboxes archive mailbox, and public folders.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When it comes to migration from Exchange Server to Exchange Online (Office&hellip; <a class=\"more-link\" href=\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/\">Continue reading <span class=\"screen-reader-text\">Troubleshooting the Exchange Hybrid Configuration Wizard (HCW) Error HCW8064<\/span><\/a><\/p>\n","protected":false},"author":17,"featured_media":164375,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2960],"tags":[5746],"class_list":["post-164281","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-migrate-to-office-365","tag-hcw-error-hcw8064","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Troubleshooting the Exchange Hybrid Configuration Wizard (HCW) Error HCW8064<\/title>\n<meta name=\"description\" content=\"Learn how to resolve the HCW8064 error and complete the Exchange Hybrid Configuration Wizard. This blog offers clear troubleshooting steps to ensure a seamless hybrid setup.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Troubleshooting the Exchange Hybrid Configuration Wizard (HCW) Error HCW8064\" \/>\n<meta property=\"og:description\" content=\"Learn how to resolve the HCW8064 error and complete the Exchange Hybrid Configuration Wizard. This blog offers clear troubleshooting steps to ensure a seamless hybrid setup.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/\" \/>\n<meta property=\"og:site_name\" content=\"Stellar Data Recovery Blog\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-18T05:57:31+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-26T07:03:52+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/03\/Troubleshooting-the-Exchange-Hybrid-Configuration-Wizard-Error-HCW8064.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Shelly Bhardwaj\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Shelly Bhardwaj\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/\"},\"author\":{\"name\":\"Shelly Bhardwaj\",\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/#\/schema\/person\/560294d29c29906f1a494397d89ac5b5\"},\"headline\":\"Troubleshooting the Exchange Hybrid Configuration Wizard (HCW) Error HCW8064\",\"datePublished\":\"2024-03-18T05:57:31+00:00\",\"dateModified\":\"2026-03-26T07:03:52+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/\"},\"wordCount\":803,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/03\/Troubleshooting-the-Exchange-Hybrid-Configuration-Wizard-Error-HCW8064.jpg\",\"keywords\":[\"HCW Error HCW8064\"],\"articleSection\":[\"Migrate to Office 365\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/\",\"url\":\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/\",\"name\":\"Troubleshooting the Exchange Hybrid Configuration Wizard (HCW) Error HCW8064\",\"isPartOf\":{\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/fix-exchange-hybrid-configuration-wizard-error-hcw8064\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/03\/Troubleshooting-the-Exchange-Hybrid-Configuration-Wizard-Error-HCW8064.jpg\",\"datePublished\":\"2024-03-18T05:57:31+00:00\",\"dateModified\":\"2026-03-26T07:03:52+00:00\",\"author\":{\"@id\":\"https:\/\/www.stellarinfo.com\/blog\/#\/schema\/person\/560294d29c29906f1a494397d89ac5b5\"},\"description\":\"Learn how to resolve the HCW8064 error and complete the Exchange Hybrid Configuration Wizard. 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