Outlook Files (.pst) Maximum Size

[Jalal]

Would like to know the maximum size of the Outlook Personel Folders/Files
(.pst).

 

[neo [mvp outlook]]

Depends on what version of Microsoft Outlook you are using.

Outlook 97 thru Outlook 2002
Max file size. 2GB
Max items per folder 65536
Max folders per folder 65536
Assumes large table support is turned on in Outlook 97 thru 2000 (its on
by default in 2002)

Outlook 2003/2007
Supports legacy PST file format (see above)
Legacy PST files are not converted to new Office Outlook Personal
Folder files
Legacy file size contraints are enforced

The new Office Outlook Personal Folder file
Max file size 20GB (assuming it is on NTFS partition)
20GB is a soft file size limit. Setting a registry key can let it
grow bigger
Unknown item/folder count

 

[Gordon]

Outlook 97 thru Outlook 2002
Max file size. 2GB
Max items per folder 65536
Max folders per folder 65536

Is there any significance in that the number of items and folders is the
same as the number of rows in Excel (prior to 2007) or is that just sheer
coincidence?

 

[Roady [MVP]]

65536 = 2^16 = 16-bit
It's the maximum value for an unsigned (short) integer declaration used in
programming and therefore also dictates the limitations of the
application/function using it.

You'll come across that number a lot when working with computers ;-)



-----

 

[neo [mvp outlook]]

got me, but if you come up with a conspiracy theory I'm sure that we would
all get a laugh out of it.

 

[Gordon]

got me, but if you come up with a conspiracy theory I'm sure that we would
all get a laugh out of it.

I'll just get me tinfoil hat.....

 

[Gordon]

65536 = 2^16 = 16-bit
It's the maximum value for an unsigned (short) integer declaration used in
programming and therefore also dictates the limitations of the
application/function using it.

You'll come across that number a lot when working with computers ;-)

Thanks! Not being a programmer.......