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If you successfully connected to the account before, try to connect to it from another Exchange application, such as Outlook on the web. You can also check the status of the Exchange server by contacting your Exchange server administrator. Cause: Items from an Exchange account are stored in the Outlook. Set up Exchange account access using Outlook for Mac. If you have Outlook for Mac, you can use it to access your Exchange account. See Add an email account to Outlook for instructions. Set up Exchange account access using Mac OS X 10.10 or later. If you're running Mac OS X version 10.10 or later, follow these steps to set up an Exchange email. Note: To see how to set up Full Access permission, see How to grant Exchange and Outlook mailbox permissions in Office 365 dedicated. Checking the setting Sync shared mailbox will allow Outlook to synchronize the shared mailbox without requiring the user to click Send/Receive. Fix Outlook connection problems in Office 365 and Exchange Online. 7/21/2020; 2 minutes to read; Applies to: Exchange Online; In this article. If you're using Outlook to access your Office 365 email account or another Exchange-based email account, and you're having problems, we want to get you back to sending and receiving email as quickly as possible. In the default configuration, depending on the size of your hard disk, Outlook synchronizes only 1, 3, or 12 months of email to your Offline Outlook Data (.ost) file from the Exchange server. If your Mail to keep offline setting is set to 12 months and you have email items in your Exchange mailbox that are older than 12 months, those items.

Original KB number: 2649169

Summary

Consider the following scenario:

You try to transfer data from Outlook 2016 for Mac or Outlook for Mac 2011, such as email and contacts, to Outlook for Windows. To do this, you try to import the .olm file that was exported from Outlook for Mac. However, you receive the following error in Outlook for Windows:

The file <path>.olm is not an Outlook data file (.pst).

More information

Microsoft Outlook for Windows doesn't support .olm data files. However, there are several methods that you can use to transfer data from Outlook for Mac to a Windows-based Outlook client. These methods require that you use Microsoft Exchange Server.

Synchronize data with Microsoft Exchange Server

If the data is available in a mailbox that is located on an Exchange Server, the Outlook for Windows client can access the data. To do this, the Windows client connects to the Exchange Server by using either Cached Exchange Mode or Online mode.

Export data from Microsoft Exchange to an Outlook data (.pst) file

Use the Export-Mailbox shell cmdlet from Microsoft Exchange PowerShell to export mailbox data to an Outlook data (.pst) file. For more information about the Export-Mailbox shell cmdlet, see:

Note

Outlook 2013 Exchange Online

Currently, Microsoft does not have a utility to convert an .olm file to a .pst file.