Exporting Mailbox Items

You can export backed-up items to a PST file.

Exporting Mailbox Items Important

To export data to PST (Personal Storage Table) files, you must have a 64-bit version of Microsoft Outlook 2016, Microsoft Outlook 2013 or Microsoft Outlook 2010 installed on a computer running restore sessions.


POST https://<hostname>:4443/v6/RestoreSessions/{restoreSessionId}/organization/mailboxes/{mailboxId}/items/exportToPst

Request Headers

The request header must contain an authorization token of the current session.

Request Parameters

The following parameters must be specified in the URL of the request:






Specifies the identification number of the restore session. For more information on how to get this parameter, see Getting Restore Sessions.



Specifies the identification number of the mailbox. For more information on how to get this parameter, see Getting Mailboxes.

Request Body

To export the backed-up items from the organization mailbox to a PST file, the request body must contain the following properties:






Specifies the IDs of mailbox items that you want to export to a PST file. For more information on how to get such IDs, see Getting Mailbox Items.



Defines whether to set the size limit for the exported PST file.

If set to true, indicates that you must specify the pstSizeLimitBytes parameter.



Specifies the limit of the exported PST file in Bytes.

You can choose the limit range from 1 GB to 49 GB.

For example:

Request Body:


   "enablePstSizeLimit": true,

   "pstSizeLimitBytes": 1073741824,

   "items":  [

   {"id": "74685f6b-16aa-4a78-a44f-05526ce0ae30"},

   {"id": "70013a9e-c446-429d-aa78-9c8c20d9b814"}



The backed-up data will be exported to a PST file and placed to a temporary folder on the Veeam Backup for Microsoft 365 server. After that, the PST file will be transferred as application/octet-stream media to the client. To download, read, convert to PST or perform other actions with the octet-stream, use features of programming languages.

If the size of the exported data exceeds the limit specified for the PST file, Veeam Backup for Microsoft 365 splits the PST file into separate files and exports these files to an archive file of the ZIP format. For example, you specified 1 GB as the PST file size limit. The size of the exported data is 1.5 GB. In this case, Veeam Backup for Microsoft 365 will export data to a ZIP archive. The archive will contain two PST files: one PST file of the 1 GB size and another PST file of the 0.5 GB size.

Exporting Mailbox Items Tip

You can use Swagger UI to download the octet-stream file by clicking the Download action link, which server returns in the response body after a successfully completed export operation. For more information, see Evaluation in Swagger UI.


The server returns the following response to the client.

Response Codes

A successfully completed operation returns response code 200 OK.

Response Headers

The response to this request contains the following headers. The response may also include additional standard HTTPS headers.




The length of the response body.


The media type and syntax of the response body message for the requests with the export and save actions: application/octet-stream.

The media type and syntax of the response body message for the requests with the restore and send actions: null.

Response Body

In the response body, the server returns binary data stream.


The example shows how to export backed-up mailbox items with the specified IDs to a PST file.


POST https://abc.tech.local:4443/v6/RestoreSessions/380d7caf-6294-4a33-b50a-b8aeb13af58c/organization/mailboxes/9e9b7199-f547-467a-b580-9d283a75eaad/items/exportToPst


Request Header:

Authorization: Bearer <Access-Token>


Request Body:


   "enablePstSizeLimit": false,

   "items":  [

     {"id": "74685f6b-16aa-4a78-a44f-05526ce0ae30"},

     {"id": "70013a9e-c446-429d-aa78-9c8c20d9b814"}





200 OK