{"id":190,"date":"2019-04-09T09:04:50","date_gmt":"2019-04-09T09:04:50","guid":{"rendered":"https:\/\/cigatisolutions.com\/blog\/?p=190"},"modified":"2026-03-16T08:57:58","modified_gmt":"2026-03-16T08:57:58","slug":"synchronization-issues-between-ost-and-exchange-server","status":"publish","type":"post","link":"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/","title":{"rendered":"Fix Synchronization Issues Between OST and Exchange Server"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;190&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;1&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;5\\\/5 - (1 vote)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Fix Synchronization Issues Between OST and Exchange Server&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (1 vote)    <\/div>\n    <\/div>\n\n<p>Critical synchronization failure occurs when the OST file becomes oversized and therefore loses the ability to communicate with the server. Ultimately, these issues make the interface look functional but are fundamentally disconnected. This requires them to repair or rebuild the cache to restore order. Read the blog carefully to understand everything you need to know to fix the synchronization issues between the OST and Exchange server. If there occurs an OST file corruption, then resolve it with a professional tool, the <strong>Cigati <a href=\"https:\/\/www.cigatisolutions.com\/ost-file-recovery-tool\/\">OST Recovery Tool<\/a><\/strong>. Let\u2019s begin the blog.<\/p>\n\n\n<div class=\"row justify-content-center mac-win-tab mt-3 mb-5\">\n<div class=\"col-md-6\">\n<div id=\"home\" class=\"tab-pane fade active show\" role=\"tabpanel\" aria-labelledby=\"home-tab\"><span class=\"block_btn\"><a class=\"primary-btn\" href=\"https:\/\/www.cigatisolutions.com\/demo-version\/Cigati-OST-File-Recovery-Demo.exe\"><i class=\"icon-windows\"><\/i> Download Now<\/a>&nbsp;&nbsp;<a class=\"secondary-btn\" href=\"https:\/\/www.cigatisolutions.com\/ost-file-recovery-tool\/purchase-now.html\"><i class=\"icon-basket\"><\/i> Purchase Now<\/a><\/span><\/div>\n<\/div>\n<\/div>\n\n\n<p><strong>London resident Michael Green asks:<\/strong> \u201cI\u2019m Michael Green. My Outlook OST file has stopped syncing properly with Exchange Server. I\u2019ve tried basic fixes, but still see missing emails and calendar entries. I\u2019m looking for a reliable solution or tool to repair the OST and restore sync. Any advice?&#8221;<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#Why_Synchronization_Is_Required\" >Why Synchronization Is Required?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#Reasons_for_Sync_Issues_Between_Outlook_and_Exchange_Server\" >Reasons for Sync Issues Between Outlook and Exchange Server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#How_to_Fix_Synchronization_Issues_Between_OST_and_Exchange_Server\" >How to Fix Synchronization Issues Between OST and Exchange Server?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#Solution_01_Maintain_a_Stable_Connection\" >Solution 01: Maintain a Stable Connection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#Solution_02_Manage_Email_Storage_Capacity\" >Solution 02: Manage Email Storage Capacity<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#Solution_03_Rebuild_OST_Data_File\" >Solution 03: Rebuild OST Data File<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#Solution_04_Repair_OST_with_Inbox_Repair_Tool\" >Solution 04: Repair OST with Inbox Repair Tool<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#Secured_Tool_to_Fix_Synchronization_Issues_Between_OST_and_Exchange_Server\" >Secured Tool to Fix Synchronization Issues Between OST and Exchange Server<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Synchronization_Is_Required\"><\/span>Why Synchronization Is Required?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Synchronizing the data is important for maintaining accurate and updated information across multiple platforms. Below are the reasons why it is required:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Data Reliability:<\/strong> Synchronization keeps the same information accessible across platforms.<\/li>\n\n\n\n<li><strong>Avoids Data Inconsistencies:<\/strong> With proper syncing, systems eliminate duplicates caused by simultaneous edits.<\/li>\n\n\n\n<li><strong>Enhances Collaboration:<\/strong> Supports seamless teamwork with instant modifications across users.<\/li>\n\n\n\n<li><strong>Safe Backup with Data Accuracy<\/strong>: Regular synchronization keeps the updated backup at all times.<\/li>\n\n\n\n<li><strong>Anywhere, Any-Device Access<\/strong>: With syncing enabled, users can access the same updated data on all devices.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Reasons_for_Sync_Issues_Between_Outlook_and_Exchange_Server\"><\/span>Reasons for Sync Issues Between Outlook and Exchange Server<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The sync issues arise due to multiple configuration-related and technical factors. Take a look at the reasons why there are sync issues:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MS Outlook will not sync properly if there are network interruptions during the communication.<\/li>\n\n\n\n<li>If Outlook\u2019s data files get corrupted, this can block proper synchronization of the email data.&nbsp;<\/li>\n\n\n\n<li>Older versions of Outlook or Exchange can lead to synchronization errors when communicating with the server.&nbsp;<\/li>\n\n\n\n<li>When the mailbox becomes oversized, it can slow down or stop Outlook from syncing completely.<\/li>\n\n\n\n<li>Also, if there occurs a problem with Cached Exchange Mode, Outlook may not sync properly.<\/li>\n<\/ul>\n\n\n\n<p>With the above points, the synchronization may affect partially or fully as well.<\/p>\n\n\n\n<p>However, these specified errors may appear in between if you face synchronization issues.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cannot start Microsoft Outlook.<\/li>\n\n\n\n<li>Cannot open the Outlook Window.<\/li>\n\n\n\n<li>The set of folders cannot be opened.<\/li>\n\n\n\n<li>The file abc.OST is not an Outlook data file.<\/li>\n<\/ul>\n\n\n\n<p>All Outlook versions are affected by this uniformity, which occurs at times. You may also get<a href=\"https:\/\/www.cigatisolutions.com\/blog\/how-to-troubleshoot-the-file-is-not-an-offline-folder-file\/\"> <strong>\u2018The File is not an Offline Folder File\u201d Error<\/strong><\/a> but you can fix it easily.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Fix_Synchronization_Issues_Between_OST_and_Exchange_Server\"><\/span>How to Fix Synchronization Issues Between OST and Exchange Server?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Some methods will help you in easily solving this issue easily. Just follow the steps below to resolve it.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_01_Maintain_a_Stable_Connection\"><\/span>Solution 01: Maintain a Stable Connection<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A stable internet connection is essential for correct synchronization. If the connection is weak, the communication between Outlook and Exchange Server gets affected.&nbsp;<\/p>\n\n\n\n<p>Look at the various solutions to check the connection:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open any browser and load any website to verify the connection.<\/li>\n\n\n\n<li>Also, open Outlook and check in the bottom-right corner for the connection status.<\/li>\n\n\n\n<li>Turn off and restart the network devices after a few minutes to refresh the connection.&nbsp;<\/li>\n\n\n\n<li>You can also try and connect to a different Wi-Fi.<\/li>\n\n\n\n<li>Disable the temporary VPN or proxy servers to test the synchronization.<\/li>\n\n\n\n<li>Furthermore, go to Settings &gt; Network &amp; Internet &gt; Status &gt; Network Troubleshooter and follow the on-screen prompts.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_02_Manage_Email_Storage_Capacity\"><\/span>Solution 02: Manage Email Storage Capacity<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>An overloaded mailbox can significantly affect the synchronization process. It can result in sync errors and frequent delays.<\/p>\n\n\n\n<p>The following are the steps to begin the process:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check the Size of the Mailbox&nbsp;<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open <strong>MS Outlook<\/strong>.<\/li>\n\n\n\n<li>Then, head to <strong>File<\/strong> &gt;<strong> Tools<\/strong> &gt; <strong>Mailbox Cleanup<\/strong>.<\/li>\n\n\n\n<li>Press <strong>View Mailbox Size<\/strong> to check the mailbox size.&nbsp;<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Delete unwanted emails&nbsp;<\/li>\n\n\n\n<li>Remove large-sized attachments<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_03_Rebuild_OST_Data_File\"><\/span>Solution 03: Rebuild OST Data File<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>If the OST file gets corrupted, then that also creates a synchronization problem. Outlook creates a fresh copy of the email data from the Exchange Server. This often resolves the synchronization inconsistencies.&nbsp;<\/p>\n\n\n\n<p>Use the step-by-step process to begin:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>First, close <strong>Outlook<\/strong> and also check the <strong>Task Manager<\/strong> to completely close the application.<\/li>\n\n\n\n<li>Now, locate the <strong>OST file<\/strong> by pressing <strong>Windows + R <\/strong>and typing: <strong>%localappdata%\\Microsoft\\Outlook<\/strong>. Then, hit <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>Next, find the OST file linked to the Exchange account and either <strong>rename<\/strong> it or <strong>delete<\/strong> it.&nbsp;<\/li>\n\n\n\n<li>At last, <strong>restart Outlook<\/strong>.&nbsp;<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_04_Repair_OST_with_Inbox_Repair_Tool\"><\/span>Solution 04: Repair OST with Inbox Repair Tool<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The <a href=\"https:\/\/www.cigatisolutions.com\/blog\/download-inbox-repair-tool\/\">Inbox Repair Tool (ScanPST.exe)<\/a> is offered by Microsoft. It can only fix the minor corruption of the OST file. This tool scans and repairs the file to allow Outlook to sync correctly.<\/p>\n\n\n\n<p>Now, follow the steps below to initiate the conversion:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>First, locate the OST file: <strong>C:\\Program Files\\Microsoft Office\\root\\Office16\\<\/strong> or <strong>C:\\Program Files (x86)\\Microsoft Office\\root\\Office16\\<\/strong>.&nbsp;<\/li>\n\n\n\n<li>Then, search for <strong>ScanPST.exe<\/strong> in the folder. Double-click it to launch it.<\/li>\n\n\n\n<li>After that, click on <strong>Browse <\/strong>and<strong> locate the OST file<\/strong>: <strong>%localappdata%\\Microsoft\\Outlook<\/strong>.<\/li>\n\n\n\n<li>Select the OST file and click on the <strong>Start <\/strong>button. Once it is scanned, press <strong>Repair<\/strong>.&nbsp;<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Secured_Tool_to_Fix_Synchronization_Issues_Between_OST_and_Exchange_Server\"><\/span>Secured Tool to Fix Synchronization Issues Between OST and Exchange Server<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The <strong>Cigati OST Recovery Tool<\/strong> can easily repair any type of OST file corruption and can easily retrieve your old OST files and their data. It is also known for its ability to fight synchronization issues between OST and MS Exchange Server as well. The application is one of the most advanced tools with a simple &amp; easy to use interface. Plus, the software has a demo \/ free version as well, which you can just download and use from their website. The demo version basically helps you to evaluate the tool and all its features.<br><strong>Note:<\/strong> The demo version basically helps you to preview all your data, but to save the files, you have to purchase the full version.&nbsp;<\/p>\n\n\n\n<p><strong>Simple steps to resolve sync issues between Outlook and Exchange Server:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Download the tool on your system first.<\/li>\n\n\n\n<li>Then, click on<strong> Open<\/strong> to browse the OST file that you want to repair.<\/li>\n\n\n\n<li>After that, select the <strong>Recovery Mode<\/strong> and confirm the <strong>file details<\/strong>.&nbsp;<\/li>\n\n\n\n<li>Once the scanning process is completed, hit <strong>Save<\/strong>, pick the destination, and select the desired <strong>File Format<\/strong>.<\/li>\n\n\n\n<li>At last, click on <strong>Ok<\/strong> to finalize the process.&nbsp;<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>Users need to resolve synchronization issues between OST and Exchange Server for uninterrupted communication. Here is a detailed guide on how to fix synchronization issues between OST and Exchange server. We have mentioned both manual techniques and how to troubleshoot this issue with reliable software, the <strong>Cigati OST File Recovery Tool<\/strong>. So, it is totally up to you to decide whether you want to go for manual procedures or good software.<\/p>\n\n\n\n<p><strong>You May Also Read:<\/strong> <a href=\"https:\/\/www.cigatisolutions.com\/blog\/fix-outlook-ost-file-cannot-be-opened\/\">Fix Outlook OST File Cannot Be Opened Error<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1771412237145\"><strong class=\"schema-faq-question\">Q: How can I check if Outlook is connected to Exchange Server?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> You can check the Outlook connection status bar at the bottom-right corner to verify if it is connected or not. Check the Work Offline mode or test sending or receiving emails.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1771412250499\"><strong class=\"schema-faq-question\">Q: What is Cached Exchange Mode, and how can it affect synchronization?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> Microsoft Outlook maintains a local copy of your mailbox data in the form of an OST file locally. If the user wants to access the email data with no internet connection, this OST file will be helpful. It affects the synchronization: faster access, sync delays, conflict issues, and mailbox size impact.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Critical synchronization failure occurs when the OST file becomes oversized and therefore loses the ability to communicate with the server.<a class=\"read-more ml-1 main-read-more\" href=\"https:\/\/www.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":197,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[],"class_list":["post-190","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-recovery"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fix Synchronization Issues Between OST and Exchange Server<\/title>\n<meta name=\"description\" content=\"Fix synchronization issues between OST and Exchange Server by checking profile settings and OST integrity. Read the full expert fix here.\" \/>\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.cigatisolutions.com\/blog\/synchronization-issues-between-ost-and-exchange-server\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fix Synchronization Issues Between OST and Exchange Server\" \/>\n<meta property=\"og:description\" content=\"Fix synchronization issues between OST and Exchange Server by checking profile settings and OST integrity. 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