PST File size limitation?

[Ben MacLeod]

Hi folks,
I am creating an Outlook addin which adds MailItems to a MAPI Folder (PST
file). While I was volume testing, I came up against what looks like a
limitation in the number of items you can add to a folder on my PC (around
14000 nearly empty items).
Does this limitation apply across the board (i.e. is it part of MAPI)? Is it
documented somewhere? I'd like to be able to take evasive action before my
addin attempts to go over this limit.
Any help is really appreciated.
Cheers,
Ben

 

[Ken Slovak - [MVP - Outlook]]

Any folder can only hold 16K items using small tables and 64K items using
large tables. Large tables were introduced in Outlook 98.

Allow Upgrade to Large Tables (CW)

----------------------------------


To make this feature available in Outlook 98 (CW), follow these steps:


1. On the Tools menu, click Services.


2. Click to select the Personal Folders service, and click Properties.


3. On the General tab, click "Allow upgrade to large tables."


4. Click OK.


Allow Upgrade to Large Tables (IMO)

-----------------------------------


To make this feature available in Outlook 98 (IMO), follow these steps:


1. Right-click the Personal Folders in the Folder List, and click Properties
on

the shortcut menu.


2. Click the Advanced button.


3. Click "Allow upgrade to large tables." Click OK and OK.

 

[Ben MacLeod]

Thanks Ken.
Does 16K/64K refer to the size of one item or to the size of the whole
folder full of items?
Ben

 

[Dmitry Streblechenko \(MVP\)]

The number of messages (16,000 and 64,000 messages).

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool