Outlook and updating increases
As a rule, when you open a PST file in Outlook, Outlook will allocate a certain part of memory to it as a cache to improve the performance.
In other words, Outlook has a limit in the amount of space available for each email accounts.
Thus when the space has run out, the Outlook error “Out of memory or system resources” will turn up.
This article will focus on this issue and offer 4 solutions.One is that you are opening over 15 PST files, all of which are in a considerable size of 1 GB or so.The other one is that More than 50 PST files of a smaller size (about 300 MB) are connected in Outlook.In a later section, it is explained how to modify this.There are various Registry settings available to control or modify the update and download behavior of the Offline Address Book in Outlook.