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:
- Click FILE
- ACCOUNT SETTINGS
- ACCOUNT SETTINGS (again – see the screen shot below)
- Double click your account
- Drag the MAIL TO KEEP ON-LINE slider to your desired time
The options are 3, 6, 12, 24 months, and everything.
You can adjust these limits using by following support.microsoft.com/kb/832925
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