{"id":87530,"date":"2021-09-08T04:30:14","date_gmt":"2021-09-08T04:30:14","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=87530"},"modified":"2025-03-24T10:19:08","modified_gmt":"2025-03-24T10:19:08","slug":"turn-off-cached-exchange-mode-in-outlook","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/turn-off-cached-exchange-mode-in-outlook\/","title":{"rendered":"How to Turn off Cached Exchange Mode in Outlook?"},"content":{"rendered":"

Cached Exchange Mode is an Outlook feature that works with Office 365 and Microsoft Exchange Server mailbox. It enables Outlook users to access and use their accounts when the internet is unreliable, slow, or unavailable. The mail items, such as emails, contacts, attachments, notes, calendar items, etc., are cached and stored locally in an Outlook OST (Offline Storage Table) file.<\/p>

The changes made offline are stored in the OST file and synced with the Exchange Server when the system goes online or connects to the Exchange Server. By default, 12 months of your mailbox data is stored in the local cache. However, you can change this setting and control how many mail items Outlook can keep offline.<\/p>

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Cached Exchange Mode<\/a> is the default and recommended mode when adding and setting up an Office 365 or Exchange Server account. However, you can enable or disable the Cached Exchange Mode based on your preference for Office 365 or Exchange and switch to Online Mode.<\/p>

<\/a>Reasons to Turn Off Cached Exchange Mode<\/strong><\/h2>

There could be various reasons to turn off the Cached Exchange Mode. Some common ones are listed below:<\/p>

1. Large OST File Size: <\/strong>Cached Exchange Mode enables Outlook to store mailbox data in an OST file and this file can grow large over a period of time. A large OST file<\/a> can slow down the Outlook’s performance.<\/p>

2. Downloading of Shared Mailbox Data: <\/strong>When Shared Folders are enabled, additional mailbox data is downloaded to the OST file. This increases the file size and may cause Outlook to experience performance delays.<\/p>

3. Synchronization Delays and Errors: <\/strong>Outlook, sometimes, takes time to sync with the Exchange Server. This can result in delays in sending or receiving new emails.<\/p>

4. Send\/Receive Errors: <\/strong>At times, you can experience error messages while sending or receiving emails. You can disable the Cached Exchange Mode in Outlook to fix the sync errors and several common Outlook issues, such as send\/receive errors.<\/p>

<\/a>Turn Off Cached Exchange Mode in Outlook<\/strong><\/h2>

Below we have discussed the steps to turn off Cached Exchange Mode in Microsoft 365, Outlook 2007, 2010, 2013, 2016, and 2019 versions.<\/p>

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Note:<\/strong> Cached Exchange Mode may not be available in your Outlook if the administrator has disabled this feature, Windows Terminal Services are installed on Windows Server, or if you are not using Exchange, Office 365, or Outlook.com account in Outlook.<\/p>\n<\/blockquote>

Steps to Turn Off Cached Exchange Mode in Outlook 2013, 2016, 2019, or Microsoft 365<\/strong><\/h3>

To turn off work offline or Cached Exchange Mode in Outlook 2013 and later, follow these steps:<\/p>