{"id":144,"date":"2019-09-23T09:40:00","date_gmt":"2019-09-23T07:40:00","guid":{"rendered":"https:\/\/greg.klonis.gr\/?p=144"},"modified":"2021-09-23T10:37:32","modified_gmt":"2021-09-23T08:37:32","slug":"how-to-remove-certificate-warning-error-after-installing-exchange-server-2016","status":"publish","type":"post","link":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016","title":{"rendered":"How to remove certificate warning error after installing Exchange Server 2016"},"content":{"rendered":"\n

Last month when we installed the Exchange Server 2016 in our company \nand migrated from the previous Exchange Server 2010, then some of our \nusers started complaining that they are getting an error related to the \nSSL Certificate in the Outlook.<\/p>\n\n\n\n

The error was:<\/p>\n\n\n\n

\u201cThe Security certificate was issued by a company you have not chosen to trust. View the certificate to determine whether you want to trust the certifying authority.\u201d<\/strong><\/p>\n\n\n\n\n\n\n\n

It is a security alert message which checks the configuration of your\n Outlook profile with the Exchange Server and presents the message to \nyou.<\/p>\n\n\n\n

The reason behind the certificate warning.<\/h3>\n\n\n\n

After the installation of Exchange Server 2016 at the organization\u2019s \nActive Directory environment, The Server setup creates a Service \nConnection Point (SCP) for the Autodiscover feature. The role of Autodiscover in Exchange Server<\/a>\n is to search for the available settings and services for the client \nsystems at the Exchange Server. So, when you create a new Outlook \nprofile with an Exchange account, then you do not need to manually set \nup the settings, but the Autodiscover will search and establish the \nconnection for you.<\/p>\n\n\n\n

The Autodiscover service connection point gets register with the help\n of a URL having the fully qualified domain name of the Exchange Server.\n You can check the URL with the help of following command run in the \nExchange Management Shell.<\/p>\n\n\n\n

Get-ClientAccessService -Identity <ServerName> | Select AutodiscoverServiceInternalUri<\/p>\n\n\n\n

Example\nGet-ClientAccessService -Identity NDPR021 | Select AutodiscoverServiceInternalUri\n<\/p>\n\n\n\n

The connection for the Autodiscover feature from the client system \ngets establish through an HTTPS (SSL) connection. The same HTTPS \nconnection used to connect with various Exchange Services like Outlook \non the Web (OWA), Activesync, Outlook Anywhere, Exchange Web Services, \netc.<\/p>\n\n\n\n

The HTTPS connection is dependent on the SSL certificate, and there \nare three criteria for the SSL certificate which it should fulfill:<\/p>\n\n\n\n

  1. The certificate is issued by a trusted Certified Authority (CA).<\/li>
  2. The certificate is not expired.<\/li>
  3. The name at the certificate should match with the server name which the client\u2019s system wants to connect.<\/li><\/ol>\n\n\n\n

    How to remove the certificate security warning<\/h4>\n\n\n\n

    There are two ways to fix the warning message:<\/p>\n\n\n\n

    1. Change the Autodiscover URL.<\/li>
    2. Install an SSL Certificate from an authorized vendor.<\/li><\/ol>\n\n\n\n

      Change the Autodiscover URL<\/h4>\n\n\n\n

      To change the Autodiscover URL, you should use a DNA name or alias of\n the Server name. It is advisable to not use the actual name of the \nExchange Server\u2019s full domain name.\nSet-ClientAccessService\n -Identity NDPR021 -AutoDiscoverServiceInternalUri \nhttps:\/\/mail.admin-theodore.com\/Autodiscover\/Autodiscover.xml\n<\/p>\n\n\n\n

      If the DNS record of the namespace is not present in the Exchange, then you need to add the A record at the internal DNS Zone.<\/p>\n\n\n\n

      Install an SSL Certificate from an authorized vendor.<\/h4>\n\n\n\n

      When the namespace is working correctly, then you need to install the\n SSL Certificate at the Exchange Server 2016. Here is the brief \nprocedure of installing the SSL certificate at the Exchange Admin \nCenter:<\/p>\n\n\n\n

      1. Login to Exchange Admin Center and go to Servers>>Certificates<\/strong>.<\/li>
      2. There is a \u2018Select Server<\/strong>\u2019 list where you need to select the specific Exchange Server to install the certificate. Choose \u2018More Options \u2022\u2022\u2022<\/strong>\u2019 and click the Import Exchange Certificate<\/strong>.<\/li>
      3. At the Import Exchange certificate<\/strong> wizard, there is a \u2018This wizard will import a certificate from a file<\/strong>\u2019 page and you need to fulfill the following data:
        \nFile to import from<\/strong>: Enter the complete UNC path for the SSL file name.
        \nPassword<\/strong>: If the certificate is protected by a password, then input the password also.
        \nClick Next<\/strong>.<\/li>
      4. At the \u2018Specify the servers you want to apply this certificate to<\/strong>\u2019 page, click the Add (+)<\/strong> icon.<\/li>
      5. Select the Exchange Server and click Add<\/strong> button. You can select as many as Exchange Server as you require.
        \nFinally, click the Finish<\/strong> button.<\/li><\/ol>\n\n\n\n

        Conclusion<\/h4>\n\n\n\n

        SSL Certificate helps the Autodiscover in a much better way to search\n for the Exchange Server settings and policies for the user\u2019s mailbox. \nBut sometimes, the data for the Exchange gets inaccessible due to \ncorruption in the database (EDB) file. The corruption can make the whole\n data of the mailbox unavailable. So, you need to check thoroughly for \nthe reason of the error and rectify the problem using any method. If any\n manual method does not work, then use Kernel for Exchange Server<\/strong> software. Its a recovery software which primarily works for the Exchange database file. Exchange Recovery software<\/a>\n can recover the data without needing the transaction log file, and you \ncan save the mailbox data again in the Live Exchange account.<\/p>\n","protected":false},"excerpt":{"rendered":"

        Last month when we installed the Exchange Server 2016 in our company and migrated from the previous Exchange Server 2010, then some of our users started complaining that they are getting an error related to the SSL Certificate in the Outlook. The error was: \u201cThe Security certificate was issued by a company you have not … Continue reading “How to remove certificate warning error after installing Exchange Server 2016”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[32],"class_list":["post-144","post","type-post","status-publish","format-standard","hentry","category-windows-server","tag-microsoft-exchange"],"yoast_head":"\nHow to remove certificate warning error after installing Exchange Server 2016 • Gregory Klonis IT Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to remove certificate warning error after installing Exchange Server 2016 • Gregory Klonis IT Blog\" \/>\n<meta property=\"og:description\" content=\"Last month when we installed the Exchange Server 2016 in our company and migrated from the previous Exchange Server 2010, then some of our users started complaining that they are getting an error related to the SSL Certificate in the Outlook. The error was: \u201cThe Security certificate was issued by a company you have not … Continue reading "How to remove certificate warning error after installing Exchange Server 2016"\" \/>\n<meta property=\"og:url\" content=\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016\" \/>\n<meta property=\"og:site_name\" content=\"Gregory Klonis IT Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/gklonis\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/gklonis\/\" \/>\n<meta property=\"article:published_time\" content=\"2019-09-23T07:40:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-09-23T08:37:32+00:00\" \/>\n<meta name=\"author\" content=\"gklonis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@gklonis\" \/>\n<meta name=\"twitter:site\" content=\"@gklonis\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"gklonis\" \/>\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:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016#article\",\"isPartOf\":{\"@id\":\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016\"},\"author\":{\"name\":\"gklonis\",\"@id\":\"https:\/\/greg.klonis.gr\/#\/schema\/person\/94626c43ab702708882d359305b7fd04\"},\"headline\":\"How to remove certificate warning error after installing Exchange Server 2016\",\"datePublished\":\"2019-09-23T07:40:00+00:00\",\"dateModified\":\"2021-09-23T08:37:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016\"},\"wordCount\":749,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/greg.klonis.gr\/#\/schema\/person\/94626c43ab702708882d359305b7fd04\"},\"keywords\":[\"Microsoft Exchange\"],\"articleSection\":[\"Windows Server\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016\",\"url\":\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016\",\"name\":\"How to remove certificate warning error after installing Exchange Server 2016 • Gregory Klonis IT Blog\",\"isPartOf\":{\"@id\":\"https:\/\/greg.klonis.gr\/#website\"},\"datePublished\":\"2019-09-23T07:40:00+00:00\",\"dateModified\":\"2021-09-23T08:37:32+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/greg.klonis.gr\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How to remove certificate warning error after installing Exchange Server 2016\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/greg.klonis.gr\/#website\",\"url\":\"https:\/\/greg.klonis.gr\/\",\"name\":\"Gregory Klonis IT Blog\",\"description\":\"IT Infrastructure Blog\",\"publisher\":{\"@id\":\"https:\/\/greg.klonis.gr\/#\/schema\/person\/94626c43ab702708882d359305b7fd04\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/greg.klonis.gr\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\/\/greg.klonis.gr\/#\/schema\/person\/94626c43ab702708882d359305b7fd04\",\"name\":\"gklonis\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/greg.klonis.gr\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/greg.klonis.gr\/wp-content\/uploads\/2025\/03\/cropped-Removal-489.png\",\"contentUrl\":\"https:\/\/greg.klonis.gr\/wp-content\/uploads\/2025\/03\/cropped-Removal-489.png\",\"width\":240,\"height\":136,\"caption\":\"gklonis\"},\"logo\":{\"@id\":\"https:\/\/greg.klonis.gr\/#\/schema\/person\/image\/\"},\"sameAs\":[\"http:\/\/greg.klonis.gr\",\"https:\/\/www.facebook.com\/gklonis\/\",\"https:\/\/www.linkedin.com\/in\/gklonis\/\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"How to remove certificate warning error after installing Exchange Server 2016 • Gregory Klonis IT Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016","og_locale":"en_US","og_type":"article","og_title":"How to remove certificate warning error after installing Exchange Server 2016 • Gregory Klonis IT Blog","og_description":"Last month when we installed the Exchange Server 2016 in our company and migrated from the previous Exchange Server 2010, then some of our users started complaining that they are getting an error related to the SSL Certificate in the Outlook. The error was: \u201cThe Security certificate was issued by a company you have not … Continue reading \"How to remove certificate warning error after installing Exchange Server 2016\"","og_url":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016","og_site_name":"Gregory Klonis IT Blog","article_publisher":"https:\/\/www.facebook.com\/gklonis\/","article_author":"https:\/\/www.facebook.com\/gklonis\/","article_published_time":"2019-09-23T07:40:00+00:00","article_modified_time":"2021-09-23T08:37:32+00:00","author":"gklonis","twitter_card":"summary_large_image","twitter_creator":"@gklonis","twitter_site":"@gklonis","twitter_misc":{"Written by":"gklonis","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016#article","isPartOf":{"@id":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016"},"author":{"name":"gklonis","@id":"https:\/\/greg.klonis.gr\/#\/schema\/person\/94626c43ab702708882d359305b7fd04"},"headline":"How to remove certificate warning error after installing Exchange Server 2016","datePublished":"2019-09-23T07:40:00+00:00","dateModified":"2021-09-23T08:37:32+00:00","mainEntityOfPage":{"@id":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016"},"wordCount":749,"commentCount":0,"publisher":{"@id":"https:\/\/greg.klonis.gr\/#\/schema\/person\/94626c43ab702708882d359305b7fd04"},"keywords":["Microsoft Exchange"],"articleSection":["Windows Server"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016#respond"]}]},{"@type":"WebPage","@id":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016","url":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016","name":"How to remove certificate warning error after installing Exchange Server 2016 • Gregory Klonis IT Blog","isPartOf":{"@id":"https:\/\/greg.klonis.gr\/#website"},"datePublished":"2019-09-23T07:40:00+00:00","dateModified":"2021-09-23T08:37:32+00:00","breadcrumb":{"@id":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/greg.klonis.gr\/index.php\/how-to-remove-certificate-warning-error-after-installing-exchange-server-2016#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/greg.klonis.gr\/"},{"@type":"ListItem","position":2,"name":"How to remove certificate warning error after installing Exchange Server 2016"}]},{"@type":"WebSite","@id":"https:\/\/greg.klonis.gr\/#website","url":"https:\/\/greg.klonis.gr\/","name":"Gregory Klonis IT Blog","description":"IT Infrastructure Blog","publisher":{"@id":"https:\/\/greg.klonis.gr\/#\/schema\/person\/94626c43ab702708882d359305b7fd04"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/greg.klonis.gr\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":["Person","Organization"],"@id":"https:\/\/greg.klonis.gr\/#\/schema\/person\/94626c43ab702708882d359305b7fd04","name":"gklonis","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/greg.klonis.gr\/#\/schema\/person\/image\/","url":"https:\/\/greg.klonis.gr\/wp-content\/uploads\/2025\/03\/cropped-Removal-489.png","contentUrl":"https:\/\/greg.klonis.gr\/wp-content\/uploads\/2025\/03\/cropped-Removal-489.png","width":240,"height":136,"caption":"gklonis"},"logo":{"@id":"https:\/\/greg.klonis.gr\/#\/schema\/person\/image\/"},"sameAs":["http:\/\/greg.klonis.gr","https:\/\/www.facebook.com\/gklonis\/","https:\/\/www.linkedin.com\/in\/gklonis\/"]}]}},"_links":{"self":[{"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/posts\/144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/comments?post=144"}],"version-history":[{"count":2,"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/posts\/144\/revisions"}],"predecessor-version":[{"id":225,"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/posts\/144\/revisions\/225"}],"wp:attachment":[{"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/media?parent=144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/categories?post=144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/greg.klonis.gr\/index.php\/wp-json\/wp\/v2\/tags?post=144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}