Jun 25, 2025 · Provides guidance for issues when you synchronize an Exchange Server mailbox with an Offline Outlook Data File.

Oct 18, 2021 · And if you are using POP account in Outlook 2010, it's an officially supported method to use the Change Folder option for the POP account, see By default, a new Outlook Data File (.pst) is …

Jun 25, 2025 · To resolve this issue, delete your .ost file and that you let Outlook redownload the information from the server that is running Microsoft Exchange Server. Close Outlook.

Jul 14, 2025 · Microsoft Outlook 2016, Outlook 2013, Outlook 2010, Outlook 2007, and Outlook 2003 support American National Standards Institute (ANSI) and UNICODE personal folders (.pst) and …

Jun 25, 2025 · Describes and provides a workaround for an issue in which you can't change the location of the offline Outlook Data File (.ost) in Microsoft Outlook 2013 or later versions.

Jul 23, 2025 · Was the OST file manually deleted, or did it disappear after a specific event (e.g., Windows update, Office repair)? Is Cached Exchange Mode enabled in Outlook?

Apr 10, 2024 · Outlook will automatically recreate a new OST file and synchronise with your mailbox. Disable Add-ins: Sometimes, Outlook add-ins can cause issues with the OST file. Try running …

Nov 26, 2024 · I understand you are looking for a way to move your large .ost file to a secondary hard drive in Outlook (Office 365). To change the location of the offline Outlook Data File (.ost) in …

Describes performance issues if there are lots of items or folders in a Cached Exchange Mode .ost or .pst file. Provides a resolution.

Oct 23, 2024 · I am trying to figure out the OST file location of the new Outlook for Windows 11; Location C:\Users<UN>\AppData\Local\Microsoft\Outlook doesn't have it. The new Outlook doesn't have a …