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jassie7383
06-02-2026, 09:08 AM
Are you seeing only 1,500 emails after importing a PST file that actually contains around 3,500 messages? This is a fairly common issue when users try to import PST files into Microsoft 365 (https://www.cigatisolutions.com/blog/import-pst-to-office-365/). Incomplete imports can occur due to PST corruption, synchronization delays, mailbox size limitations, damaged folders, or interruptions during the Outlook import process.

You can try the manual approach first by checking the PST file with Outlook's Inbox Repair Tool (ScanPST), verifying mailbox quotas, and re-running the import. However, troubleshooting large PST files manually can be time-consuming and doesn't always guarantee complete results.

For a more reliable option, many users choose the Cigati PST to Office 365 Migration Tool (https://www.cigatisolutions.com/pst-to-office365-migration/). It helps Import PST Files to Office 365 accurately while preserving folder hierarchy and data integrity. The tool supports bulk migration of multiple PST files, offers selective migration filters, and features a simple, user-friendly interface. It is compatible with various Windows and Outlook versions and ensures a fast, secure, and accurate migration process.

If you need to Import PST Files to Office 365 without missing emails, an automated solution is often more efficient and easier to manage, especially for non-technical users handling large mailbox data.

Mark Wilson
06-03-2026, 06:01 AM
Are you need an PST to Office 365 Converter tool to convert PST files into Office 365 (https://www.cubexsoft.com/blog/export-a-mailbox-from-pst-to-office-365/) cloud account then you can use the professional solution that name is CubexSoft PST Converter (https://www.cubexsoft.com/outlook-export/) software. An effortless method to export user-selective PST files to Microsoft 365 cloud account. Users can download this software in any Mac and Windows OS edition to convert PST files to Office 365. Users are free to move selective PST files before converting them into Office 365. There are users can store converted PST files as per required location on the desktop. Get the free demo edition of this tool to see more features of this advanced tool.

auraflicker
08-27-2026, 03:59 AM
If only 1,500 of 3,500 PST emails are migrated to Microsoft 365, first check whether the remaining emails are in the source PST and which folders were skipped.

You can scan the PST and preview its full folder before trying another import. Here, the WholeClear PST to Office 365 Converter is worth considering, as it supports both complete PST migration and selective folder transfer. It can move emails with attachments and keep folder hierarchy and email properties like From, To, CC, BCC, subject and date/time.

A practical way to handle the incomplete migration is to preview the PST, identify the folders that contain the missing 2,000 emails, and then import those folders separately into the Microsoft 365 account. This also avoids the retransmission of data that has already arrived.