{"id":44192,"date":"2019-08-27T19:06:34","date_gmt":"2019-08-27T19:06:34","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=44192"},"modified":"2025-09-25T09:26:56","modified_gmt":"2025-09-25T09:26:56","slug":"migrate-thunderbird-to-office-365-account","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/migrate-thunderbird-to-office-365-account\/","title":{"rendered":"How to Migrate Thunderbird to an Office 365 Account?"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><?xml encoding=\"utf-8\" ?><p>Office 365 (Microsoft 365) &ndash; a cloud-based subscription service &ndash; provides various productivity tools, including Outlook for email communication, Microsoft Teams for collaboration, and others. It offers flexibility of accessing data from anywhere, at any time, and using any device. Due to these and various other benefits, businesses and organizations prefer this cloud-based service over desktop-based email clients, like Mozilla Thunderbird.<\/p><p>However, migrating from Thunderbird to Office 365 is not a simple task as both platforms use different data file formats. Thunderbird stores the mailbox items in MBOX file format, whereas Office 365 supports PST file format. But there are various specialized MBOX to PST converter tools available that can help in migrating data from Thunderbird data (MBOX) to Office 365.<\/p><p>In this post, you will know the detailed process of migrating data from Thunderbird MBOX file to Office 365 using a reliable MBOX to PST converter tool. You&rsquo;ll also learn a workaround to migrate mail items from Thunderbird to Office 365. &nbsp;&nbsp;<\/p><h2 class=\"wp-block-heading\" id=\"why-migrate-from-thunderbird-to-office-365?\">Why Migrate from Thunderbird to Office 365?<\/h2><p>Switching from Mozilla Thunderbird to Office 365 has several advantages for businesses and users, such as:<\/p><ul class=\"wp-block-list\">\n<li>Users can access emails, contacts, calendars, etc., from anywhere, anytime, and using any device. All it requires is an active internet connection.<\/li>\n\n\n\n<li>Users can use collaborative applications, such as Microsoft Teams, SharePoint, OneDrive, Word, Excel, PowerPoint, and more.<\/li>\n\n\n\n<li>It offers enterprise-grade security features, like Multi-Factor Authentication (MFA), Advanced Threat Protection, etc., to safeguard user data and privacy.<\/li>\n<\/ul><h2 class=\"wp-block-heading\" id=\"key-differences-between-mozilla-thunderbird-and-office-365-(microsoft-365)\">Key Differences between Mozilla Thunderbird and Office 365 (Microsoft 365)<\/h2><p>Here are some key differences between Mozilla Thunderbird and Office 365.<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Mozilla Thunderbird<\/strong><\/td><td><strong>Office 365 (Microsoft 365)<\/strong><\/td><\/tr><tr><td>Mozilla Thunderbird is a free desktop-based email client<\/td><td>Microsoft 365 is a cloud-based subscription service<\/td><\/tr><tr><td>Supports MBOX file format<\/td><td>Supports PST file format<\/td><\/tr><tr><td>Suitable for email communication<\/td><td>Cloud-based enterprise solution that provides access to a suite of productivity tools<\/td><\/tr><tr><td>Requires additional plugins (add-ons) to export\/import data<\/td><td>Built-in features to import\/export data<\/td><\/tr><tr><td>Installed as a desktop application on Windows, Mac, and Linux systems<\/td><td>Cloud-based service accessible as web-based, desktop, and mobile application on various platforms<\/td><\/tr><tr><td>No dedicated customer support is available<\/td><td>Dedicated customer support is available<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\" id=\"simplest-way-to-migrate-thunderbird-data-to-office-365\">Simplest Way to Migrate Thunderbird Data to Office 365<\/h2><p>An easy way to migrate Thunderbird data to an Office 365 account is by using <strong>Stellar Converter for MBOX Technician<\/strong> &ndash; an advanced MBOX to PST converter tool. With this tool, you can effortlessly migrate Thunderbird MBOX file data, including emails, contacts, calendars, etc., to an Office 365 account with 100% accuracy and complete data integrity. It uses Microsoft&rsquo;s Modern Authentication technique to securely connect and export the MBOX file data to mailboxes on Office 365 (Microsoft 365).<\/p><p>This tool also lets you convert and save the MBOX file data in PST, PDF, RTF, EML, etc. Apart from Thunderbird, it supports MBOX files of almost all MBOX-based email clients, including Apple Mail, Eudora, Entourage, Netscape, SeaMonkey, Spicebird, and Google Takeout.<\/p><p>Now, let&rsquo;s see how to use this tool to migrate Thunderbird MBOX data to Office 365:<\/p><blockquote class=\"note_alert\">\n<p><strong>Before you Proceed:<\/strong> <a href=\"https:\/\/www.stellarinfo.com\/article\/how-to-use-import-export-ng-tools.php\">E<em>xport Thunderbird mailbox data to an MBOX file<\/em><\/a><em> (if not already).Configure your Office 365 account in the Outlook desktop application installed on your system.<\/em><\/p>\n<\/blockquote><ul class=\"wp-block-list\">\n<li>Download and install <a href=\"https:\/\/www.stellarinfo.com\/email-tools\/mbox-to-pst-converter.php\"><strong>Stellar Converter for MBOX Technician<\/strong><\/a> from its official website.<\/li>\n\n\n\n<li>When you launch the tool, you will see the <strong>Select MBOX<\/strong> window. Use the dropdown menu against the <strong>Select Mail Client<\/strong> option to select the email client (<strong>Thunderbird<\/strong>).<\/li>\n<\/ul><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"568\" height=\"495\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/Select-mailbox.jpg\" alt=\"Select Mail Client option to select the email client\" class=\"wp-image-184970 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/Select-mailbox.jpg 568w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/Select-mailbox-300x261.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/Select-mailbox-150x131.jpg 150w\" sizes=\"auto, (max-width: 568px) 100vw, 568px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Once you select the Thunderbird email client, the tool will automatically select the default path of the Thunderbird MBOX file.<\/li>\n<\/ul><blockquote class=\"note_alert\">\n<p><strong>Note<\/strong>: If you want to select MBOX file stored at a different location, click on the <strong>Select Identity<\/strong> button.<\/p>\n<\/blockquote><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"566\" height=\"330\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/MBOX-file.jpg\" alt=\"click on the Select Identity button\" class=\"wp-image-184971 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/MBOX-file.jpg 566w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/MBOX-file-300x175.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/MBOX-file-150x87.jpg 150w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>After selecting the MBOX file, click on <strong>Convert<\/strong>.<\/li>\n\n\n\n<li>The tool will scan the MBOX file and display all the mailbox items.<\/li>\n<\/ul><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"493\" height=\"121\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/process.jpg\" alt=\"scan the MBOX file in Process\" class=\"wp-image-184972 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/process.jpg 493w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/process-300x74.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/process-150x37.jpg 150w\" sizes=\"auto, (max-width: 493px) 100vw, 493px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>You can preview the mailbox items.<\/li>\n<\/ul><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"750\" height=\"400\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/preview.jpg\" alt=\"preview window \" class=\"wp-image-184973 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/preview.jpg 750w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/preview-300x160.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/preview-150x80.jpg 150w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Select the items you want to export to Office 365 and click on the <strong>Save Converted File<\/strong> button under the <strong>Home<\/strong> tab.<\/li>\n<\/ul><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"321\" height=\"292\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/save-as.jpg\" alt=\"click on the Save Converted File\" class=\"wp-image-184974 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/save-as.jpg 321w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/save-as-300x273.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/save-as-150x136.jpg 150w\" sizes=\"auto, (max-width: 321px) 100vw, 321px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Choose the <strong>Export to Microsoft 365<\/strong> option in the <strong>Save As<\/strong> window. Click <strong>Next<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"607\" height=\"236\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/export.jpg\" alt=\"Choose the Export to Microsoft 365 option\" class=\"wp-image-184975 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/export.jpg 607w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/export-300x117.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/export-150x58.jpg 150w\" sizes=\"auto, (max-width: 607px) 100vw, 607px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>The <strong>Microsoft 365 Login<\/strong> window will appear. Use the dropdown list to select the Microsoft 365 profile in which you want to migrate Thunderbird data. After selecting the profile, click on <strong>Migrate<\/strong>.<\/li>\n<\/ul><blockquote class=\"note_alert\">\n<p><strong>Note<\/strong>: <em>The tool will automatically detect the Office 365 profile configured with the Outlook application.<\/em><\/p>\n<\/blockquote><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"366\" height=\"212\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/migrate.jpg\" alt=\"selecting the profile, click on Migrate\" class=\"wp-image-184978 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/migrate.jpg 366w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/migrate-300x174.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/migrate-150x87.jpg 150w\" sizes=\"auto, (max-width: 366px) 100vw, 366px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Once the Thunderbird MBOX data is successfully migrated to Office 365 account, you will see the <strong>Migration Successful<\/strong> dialog box. Click <strong>OK<\/strong> to complete the process.<\/li>\n<\/ul><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"415\" height=\"149\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/success.jpg\" alt=\"Click OK to complete the process\" class=\"wp-image-184976 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/success.jpg 415w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/success-300x108.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/success-150x54.jpg 150w\" sizes=\"auto, (max-width: 415px) 100vw, 415px\" \/><\/figure><p>You can also use this tool to <a href=\"https:\/\/www.stellarinfo.com\/blog\/export-thunderbird-outlook-pst\/\">convert Thunderbird MBOX file to PST file<\/a> and then import the PST file into Office 365.<\/p><h2 class=\"wp-block-heading\" id=\"manual-method-to-migrate-thunderbird-data-to-office-365\">Manual Method to Migrate Thunderbird Data to Office 365<\/h2><p>There is a workaround to migrate Thunderbird data to Office 365. In this, you need to configure the Office 365 account in Thunderbird, and then drag and drop the mail items from Thunderbird into Office 365. Follow the steps given below:<\/p><ul class=\"wp-block-list\">\n<li>Launch Mozilla Thunderbird on your Windows PC.<\/li>\n\n\n\n<li>Click on the gear icon at the bottom-left corner to open <strong>Settings<\/strong>.<\/li>\n\n\n\n<li>Click on <strong>Account Settings<\/strong>.<\/li>\n\n\n\n<li>Then, click on <strong>Account Actions<\/strong> in the left pane and select the <strong>Add Mail Account<\/strong> option.<\/li>\n<\/ul><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"394\" height=\"380\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/add-mail.jpg\" alt=\"select the Add Mail Account option\" class=\"wp-image-184980 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/add-mail.jpg 394w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/add-mail-300x289.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/add-mail-150x145.jpg 150w\" sizes=\"auto, (max-width: 394px) 100vw, 394px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>On the <strong>Account Setup<\/strong> screen, enter your Microsoft 365 credentials and click on <strong>Configure Manually<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"586\" height=\"456\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/set-up-your-existing-eamil.jpg\" alt=\"enter your Microsoft 365 credentials\" class=\"wp-image-184982 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/set-up-your-existing-eamil.jpg 586w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/set-up-your-existing-eamil-300x233.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/set-up-your-existing-eamil-150x117.jpg 150w\" sizes=\"auto, (max-width: 586px) 100vw, 586px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Next, add the following details:<ul><li>Incoming: IMAP|outlook.office365.com|993|SSL\/TLS|OAuth2<\/li><\/ul>\n<ul class=\"wp-block-list\">\n<li>Outgoing: SMTP|smtp.office365.com|587|STARTTLS|OAuth2<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Click <strong>Re-test<\/strong> to test the settings. Once it is successful, click on <strong>Done<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"617\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/Process-done.jpg\" alt=\" successful done\" class=\"wp-image-184983 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/Process-done.jpg 400w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/Process-done-194x300.jpg 194w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/08\/Process-done-150x231.jpg 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure><p>Wait for the completion of synchronization. Then, drag and drop the required emails from your Thunderbird into Office 365.<\/p><p><strong>Limitations of the Above Workaround<\/strong><\/p><p>The above workaround can work but it has some limitations, such as:<\/p><ul class=\"wp-block-list\">\n<li>It is suitable for migrating only emails.<\/li>\n\n\n\n<li>It is a lengthy and time-consuming process.<\/li>\n\n\n\n<li>Thunderbird may fail to establish connection with Office 365 account due to incorrect configuration settings.<\/li>\n<\/ul><h2 class=\"wp-block-heading\" id=\"wrapping-it-up\">Wrapping it Up<\/h2><p>As there is no direct way to migrate Thunderbird data to Office 365, you can configure Office 365 account in Thunderbird &ndash; a workaround to migrate emails or use a specialized MBOX to PST converter tool. However, the best option is to use Stellar Converter for MBOX Technician. This tool can help you to directly migrate mailbox data from Thunderbird MBOX file to your Office 365 Account.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Office 365 (Microsoft 365) &ndash; a cloud-based subscription service &ndash; provides various&hellip; <a class=\"more-link\" href=\"https:\/\/www.stellarinfo.com\/blog\/migrate-thunderbird-to-office-365-account\/\">Continue reading <span class=\"screen-reader-text\">How to Migrate Thunderbird to an Office 365 Account?<\/span><\/a><\/p>\n","protected":false},"author":83,"featured_media":44193,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[838],"tags":[],"class_list":["post-44192","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mbox-file","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Migrate Thunderbird to an Office 365 Account?<\/title>\n<meta name=\"description\" content=\"Use Stellar Converter for MBOX for fast, secure migration with 100% data integrity. Supports multiple MBOX email clients and saves data in PST, PDF, EML, and more.\" \/>\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\/migrate-thunderbird-to-office-365-account\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Migrate Thunderbird to an Office 365 Account?\" \/>\n<meta property=\"og:description\" content=\"Use Stellar Converter for MBOX for fast, secure migration with 100% data integrity. 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