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SOLVED: What is the Maximum Size of An Outlook .PST or .OST in Outlook 2013

The maximum OST / PST file size number differs depending on the version Outlook and type of .PST .OST:

Outlook 2002 – 2GB Legacy “ANSI”
Outlook 2003 – 20GB Unicode
Outlook 2007 – 20GB Unicode
Outlook 2010 – 50GB Unicode
Outlook 2013 – Variable

In Outlook 2013 you can set the amount of time (1 year is the default) email should be stored locally in your .OST and the balance will be kept on your Exchange server.  This means you no longer need to choose between cached mode and non-cached mode… now you can use a hybrid.    This is a HUGE improvement!

To configure this setting start Outlook 2013 and:

  1. Click FILE
  2. ACCOUNT SETTINGS
  3. ACCOUNT SETTINGS (again – see the screen shot below)
  4. Double click your account
  5. Drag the MAIL TO KEEP ON-LINE slider to your desired time

The options are 3, 6, 12, 24 months, and everything.

How To Set The Maximum OST Storage Size Outlook 2013

How To Set The Maximum OST Storage Size Outlook 2013

You can adjust these limits using by following support.microsoft.com/kb/832925

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  1. avatar
    OSTtoPST10-10-12

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    • avatar
      Ian Matthews10-14-12

      I normally delete such posts because I don’t like the advertising but I have purchased and used OSTtoPST and can say that it does work.

      It is not as pretty as you would expect but it is functional and has saved my bacon a few times.

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