EV first evaluates the prohibit receive value when considering if someone is past their Exchange quota limit. If a prohibit receive value is not set, EV then utilizes the value set to prohibit send for the applicable mailbox. If there is nothing set for prohibiting sending or receiving, then EV will utilize the value set to warn a user of excessive quota utilization.

This behavior can be modified by utilizing the "PreferQuotaNoSendLimit" registry key. Below is the location and details of this key:

Warning: Incorrect use of the Windows registry editor may prevent the operating system from functioning properly. Great care should be taken when making changes to a Windows registry. Registry modifications should only be carried-out by persons experienced in the use of the registry editor application. It is recommended that a complete backup of the registry and workstation be made prior to making any registry changes. 

Registry Key Name - PreferQuotaNoSendLimit

Location

For 32 bit operating system

HKEY_LOCAL_MACHINE\SOFTWARE\KVS\Enterprise Vault\Agents\
 
For 64 bit operating system
 
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\KVS\Enterprise Vault\Agents\

Content - DWORD

Instructions on usage:

A value greater than zero signifies a preference for the NO_SEND limit over the NO_SEND_RECEIVE limit. If the value is zero or missing then the behavior is as before and NO_SEND_RECEIVE takes preference. However, if the NO_SEND_RECEIVE limit is set to a value smaller than the NO_SEND limit then NO_SEND_RECEIVE will be used, even if the registry value is set.

** Please note**

Once a mailbox has surpassed the limit set to receive items, archiving against that mailbox is prohibited due to the Exchange limit. This is expected behavior as all mailbox interactions are prohibited due to the limit set on Exchange.