Tag Archive: Windows Mail

Jan 25

How to fix error: 452 4.3.1 Insufficient system resources on Exchange Server 2007 or 2010

A Guide to Back Pressure in Microsoft Exchange Server   For most Exchange administrators the first time they encounter the concept of “back pressure” is when they see this error: 452 4.3.1 Insufficient system resources   The resource pressure increased from Medium to High. The following resources are under pressure: Private bytes = 76% [High] …

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