Ost file size issues

How can I increase the limit for ost-files and make Outlook support larger mailboxes? In Outlook , the maximum size of a Unicode ost-file has been limited to 20GB. In Outlook , , , and Microsoft , this limit is set to 50GB. Although you can increase this limit beyond 50GB, it is not recommended to do so due to possible performance concerns. However, you are of course free to try and see if your computer can deal with larger ost-files.

You can increase the maximum ost-file size via the Registry or Group Policy. These techniques are discussed after the Registry and Group Policy method. Note: The file size settings and restrictions for ost-files are handled by the same methods as for pst-files.

The second value is how many MB the system can write to a pst-file. User's post on November 16, Hi Jacque, The default maximum size for a Unicode. The following list summarizes expected behavior based on the size of your Outlook data file.

Up to 5 GB: This file size should provide a good user experience on most hardware. Between 5 and 10 GB: This file size is typically hardware dependent. Therefore, if you have a fast hard disk and lots of RAM, your experience will be better.

However, slower hard disk drives, such as drives that are typically found on portable computers or early-generation solid-state drives SSDs , experience some application pauses when the drives respond. More than 10 GB: When the. Very large 25 GB or larger : An. Thanks, Toby.

For example, you may be unable to reduce the size of your mailbox if you have to maintain an archive of all sent and received email messages over a span of several years. For Outlook and later versions, you can also try to use the Sync Slider feature for Cached Mode profiles.

This feature lets you control how many months of email messages are synchronized with your. For more information about the Sync Slider feature, see Only a subset of your Exchange mailbox items are synchronized in Outlook.

If you have a large. These typical operations include reading email messages, moving email messages, and deleting email messages. For more information about how to troubleshoot performance issues in Outlook, see How to troubleshoot performance issues in Outlook.

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