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How to Determine the size of your PST File for Hosted Email

How to Determine the size of your PST File for Hosted Email


If you are considering migrating your email outside of the office to a cloud-based or hosted Exchange provider like Microsoft 365, Inbox Solutions, or one of the thousands of others, undoubtedly the size of your PST file in Microsoft Outlook will be a topic of conversation before doing so.

So just what is a PST file?

As defined by Wikipedia: “ In computing, a Personal Storage Table (PST) is an open, proprietary file format used to store messages, calendar events, and other items within Microsoft software such as Microsoft Exchange Client, Windows Messaging, and Microsoft Outlook.”

To Normal People: it is the size of the file that holds your existing email, contacts, calendar information, etc. that is currently stored in your Microsoft Outlook. Each individual email address has their own PST file (i.e. the size of xxx@myteltek.com’s PST file will be different then yyy@myteltek.com); while the total size of every user is relevant typically hosted email providers set limitations on individual users PST file sizes).

This is important because the larger your PST file gets the more costly it will be to maintain in the cloud. Also, once it gets to a certain size there can be difficulty maintaining your email in a hosted or cloud environment.

The link to the Teltek guide below, “How to determine your PST file size in Outlook” you will find step by step instructions on how to identify your version of Microsoft Outlook and then the size of your PST file. Be sure to use this information when considering hosted email providers as size limits and costs vary based on the size of each mailbox’s PST file. If you have any questions about how to determine the size of your PST file or if Hosted Exchange is right for you feel free to give the Teltek Helpdesk a call at 410.552.6580 or 1.866.9.Teltek.

How to determine your PST file size

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