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Increase Outlook 2007 Data size

User is using Outlook 2007. Email is hosted. Mailbox size is 25 GB. However, the default outlook data file size is only 2 GB.

1) Does the email host need to run on Exchange 2007 or higher ?

2) How can default outlook data file size be increased ?

2 Solutions
Alan CoxSr. Systems EngineerCommented:
No, it depends on how the PST was created.
Here is a link on how to move to unicode. http://office.microsoft.com/en-us/outlook-help/convert-a-non-unicode-data-file-pst-to-a-unicode-data-file-pst-HP001038351.aspx
Lee W, MVPTechnology and Business Process AdvisorCommented:
"Default" in 2003, 2007, and 2010 is Unicode based PST files.  Unicode based files have no technical limit, though I believe registry settings can put a limit on them.  And if they get relatively large, performance can be an issue.

All versions of outlook commonly used today also support legacy PST files which are ANSI based and 2 GB in size.   I know of no method to convert them, but you can create a new one of 2003 and later type and then move all your data from the old to the new.

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