However, one can change this value by editing the registry entries.Ĭonfigure the PST file size limit in MS Outlook Maximum size of PST files (50 GB) The maximum size for a UNICODE PST file in Outlook 2010 and later is 50 GB.Default size of PST files (25 GB size) The default size for a UNICODE PST in Outlook 2010 and later is 25 GB.So one has to be careful while using Outlook in older generations of PCs. However, performance will be affected if the hardware is not sufficient.
Regarding the desirable size of PST files, Microsoft provides the following guidelines: When the Outlook become slower considerably, then you should try to find out the suitable methods to reduce the PST file size. A PST file can contain multiple mailboxes and it is elastic enough to accommodate multiple GBs in it. It is due to the large size of the PST file. If your application has started showing all such symptoms while sending, receiving, or deleting the emails, then it means that the data file has become lethargic. Microsoft Outlook is supposed to work effectively without any lagging, abruption, or pause.
