Trying to import PST files exported from Exchange Server 2016, I am receiving the message:

some items cannot be copied, they were either moved or deleted, or access was denied.

But the items are there in the PST because I can see them.

It seems to get a little closer to completing with each attempted import, but I don't remember it ever being this unreliable before.

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Users can import PST into Office 365 in several ways; The best way to do this will be what they need. Technically savvy users can manually import their PST files into Office 365 but this method has many drawbacks such as data loss, file size limitation, cumbersome steps, and time-consuming resources they bring into process so most users do not recommend this method the help of the application, users can use a reliable application that ranks three like Softaken Mail Importer Software have been used to import their local files to Cloud-based email clients like Hotmail, Gmail, G Suite, AOL etc. Also, this application is so simple without any technical knowledge Users can use this program on their operating system. All versions of Microsoft Windows including 11, 10, 8.1, 8, 7, XP, Vista, and all versions listed below are compatible with this advanced software. It also offers a free trial of this utility to learn more about this user-friendly system.

What a load of nonsense. There is no data loss when importing PST into Microsoft 365. I do it pretty much daily. The process is simple and highly reliable even if you have to restart the operation a few times, just make sure you choose not to import duplicate items. The thing to remember about all these people trying to sell expensive software to do it for you is that they just use the same MS library to do the same job anyway and so it doesn't make any difference at all!

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You may also use MacMister PST Converter solution to import PST files into Office 365 directly with all emails and attachments. The application is easy to use, simple, and advanced. Both technical and non-technical users can also utilize the software and perform the migration of PST files with ease. Its features are also remarkable with the help of users may import PST to Office 365 on Mac according to the requirements. However, besides Office 365, the tool has 15+ more saving options in which users can import PST files. Download the software free demo to check how to import PST files to Office 365 for free.

OK but what makes it any better than just using Outlook or any other tool, apart from the 'free demo until you need to actually import something' feature?

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Transferring PST files to Office 365 may be a challenging task, particularly when the amount of data is huge. Although Outlook can be used in a simple way, it is not very suitable for mass transfers. It is simplified using a PST converter tool that enables you to preview and filter PST files while importing them directly into Office 365 without losing their emails and attachments as well as their folder structure. To make the process much easier, resort to a well-known tool, such as BLR Tools.

Try DataVare PST to Office 365 Converter if you are looking for a quick and easy way to import PST files into Office 365. Compared to using Microsoft tools like AzCopy and CSV files or the manual Outlook technique, it is far simpler. There are no technical procedures required while using this application, simply choose your PST file, enter your Office 365 login, and the import begins. It functions with Primary, Archive, and Shared mailboxes and supports one or more PST files. It is ideal for people and companies seeking a simple, fast solution. Additionally it provides a free Demo version.

But what's the point in even writing something that Exchange Server and outlook both do already? Why would anyone bother writing an app that just rebrands a VB library for importing PSTs?

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Maybe for you, I find it a doddle. If you're not a technical person why would you be importing PST files anyway? Ussers coming to 365 can just copy important emails from a PST into their new Outlook account and just keep the old archive open.

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AzCopy is a command-line utility designed to copy data to and from Azure Blob, File, and Table storage, including transferring data between storage accounts. It's highly optimized for performance and reliability, especially for large volumes of data or high-throughput transfers.

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1. How to Download/Install AzCopy

AzCopy is distributed as a single, self-contained executable file, making installation very simple-there's no complicated installer.

Operating System	Installation Steps
Windows	1. Download the compressed folder (ZIP file) for AzCopy from the Microsoft documentation page. 2. Extract the files (the main executable is azcopy.exe). 3. Move the extracted file to a directory of your choice. 4. (Optional but Recommended) Add the directory to your system's PATH variable to run azcopy from any folder.
Linux	1. Download the compressed file (TAR file) for AzCopy from the Microsoft documentation page. 2. Extract the files using a command like tar -xvf azcopy_linux_<version>.tar.gz. 3. Move the extracted file to a common directory like /usr/local/bin to make it globally accessible.
macOS	1. Download the compressed file (ZIP file) for AzCopy from the Microsoft documentation page. 2. Extract the files. 3. Move the executable to a common directory like /usr/local/bin.

After installation, you typically start by authorizing AzCopy to access your storage account. The simplest method is to use Azure Active Directory (Azure AD):

azcopy login 

This will prompt you to open a specific URL and enter a code to authenticate using your Azure credentials.

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2. When to Use AzCopy

AzCopy excels in scenarios involving large-scale data movement where standard tools or application-level APIs are too slow or unreliable.

Use Case	AzCopy Advantage
Large-Scale Migration	Moving terabytes of data between an on-premises location and Azure storage, or between different regions within Azure.
High-Performance Transfers	Utilizing optimized parallel processing and checkpoints to ensure reliability and speed over high-latency networks.
Data Synchronization	Synchronizing entire directories (folders) to Azure storage, updating only files that have changed since the last transfer.
Account to Account Copy	Copying data directly between different Azure storage accounts (Blob/File/Table), often without routing the data through your local machine.
Fine-Grained Control	Applying specific filters to transfers, such as using wildcards, specifying file sizes, or filtering based on last-modified timestamps.

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3. Who is AzCopy For?

AzCopy is primarily a professional tool, though its command-line interface makes it accessible to advanced end-users.

• Professionals (Primary Audience):
  
  
  • DevOps Engineers and System Administrators who manage cloud environments, perform automated data backups, and configure disaster recovery solutions.
  
  
  • Data Engineers who need to ingest large datasets into Azure for processing or analysis.
  
  
  
  


• End-Users (Secondary Audience):
  
  
  • Any technically savvy end-user who needs to upload or download very large files (e.g., videos, massive backups) to personal or shared Azure storage and requires a tool more robust than a browser or standard file transfer application.
  
  
  
  

Since it is a command-line tool, it requires comfort with terminal commands and an understanding of Azure storage concepts (like containers, account keys, and SAS tokens). It is not a typical graphical drag-and-drop tool for non-technical users.

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