Ways to Import OLM Mailbox items into Office 365

  •   Written By
  • Published on
    October 23rd, 2019
  • Updated on
    February 20, 2021
  • Read Time
    4 minutes

MS Outlook is the most widely used email clients, especially in a professional environment. The Outlook is available in Windows as well as Mac operating systems. The only difference is the file format for data storage. On Windows, Outlook creates the PST file whereas Mac machines use Outlook 2011, which creates OLM file format for data storage.

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Most of the users nowadays want to export OLM files to Office 365. Due to the unavailability of a suitable approach, they won’t be able to perform OLM to Office 365 conversion. Microsoft does not have any defined utility to transfer OLM files to Office 365 directly. As there is no direct solution, so we will import OLM Mailbox items into Office 365 by using the following method.

Method 1: Import OLM into Office 365 Using IMAP Account

The following method is summarized into three stages:

  1. Configure Gmail in Mac Outlook
  2. Export Outlook Mac data to Gmail
  3. Configure Gmail in Windows Outlook

Part 1 Configure Gmail in Mac Outlook

  1. First of all, open Outlook for Mac and then go to the Outlook tab and choose preferences.
  2. In the Personal Settings option, select the Accounts option.
  3. After that, click on + icon and choose the email option.
  4. Then enter the Gmail account username and password and then click on the Add Account button.
  5. Your Gmail account will be added to your Mac Outlook Profile.

Part 2 Export Mac Outlook files to Gmail

  1. First of all, Open Mac Outlook Application. Then right-click on the configured email account folder. Select the New Folder option.
  2. Provide a name to the new folder. Click on the File menu and then choose Import.
  3. An Import Wizard will open up, select Outlook data file and click Next.
  4. Next, select the Outlook for Mac Data file (.olm) option.
  5. Select the OLM file and click on the Import option.
  6. Once the process gets completed, you will get the Import Complete message. Click on the Done button.
  7. Now, you will see the import messages in Mac Outlook. Select all messages and right-click on them.
  8. After that, select the Move option and then select the Choose Folder option.
  9. All emails are moved to the configured Gmail account.

Part 3 Configure Gmail Account to Windows Outlook

  1. Firstly, open the Outlook 2016 application.
  2. Go to the File menu and click on the Add account.
  3. You will get two options, choose Manual setup or additional server types option.
  4. Now, select POP or IMAP option.
  5. You have to fill your name and email address under user information.
  6. In server information, select POP3 in account type. Fill pop.gmail.com in the incoming mail server and smtp.gmail.com is an outgoing mail server.
  7. Under logon information, type your Gmail address and password.
  8. Click on More settings option.
  9. In Internet email settings, open the Outgoing server tab and tick My Outgoing Server requires authentication.
  10. In the advanced tab, input 995 as incoming server and 465 as an Outgoing server. Also, make sure the option This server requires an encrypted connection option is checked. Click OK.

Read More:
Configure Gmail Account with Outlook 2019/2016/2013/2010
How to Configure Office 365 in Outlook

Method 2: Professional Solution to Import OLM mailbox items into Outlook PST

If you don’t want to follow the lengthy manual solution as it is a time-consuming procedure then here is an alternate solution for you and that is OLM to PST Converter for Mac. This utility can easily convert Mac Outlook to PST format within a few minutes. The software can handle any size OLM file to export into PST format. Not only this the software also splits the PST file into the desired size after the conversion.


The above article is describing the best ways to import OLM into Office 365. Microsoft utility does not support importing the OLM file into Office 365. So, it becomes challenging to migrate to Cloud Office 365. The conversion is possible with IMAP account configuration or configuring the PST Capture Agent, but both these methods have certain limitations which make them less efficient, in comparison. It is recommended to use the software for hassle-free conversion The tool directly exports all components of the mailbox data to Office 365 without affecting the file format.

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