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Event ID: 8528 Source: MSExchangeIS

Source
Level
Description
The mailbox for /o=MYORG/ou=CORP/cn=RECIPIENTS/cn=PSEETHARAM has exceeded the maximum mailbox size. This mailbox cannot send or receive messages. Incoming messages to this mailbox are returned to sender. The mailbox owner should be notified about the condition of the mailbox as soon as possible.
Comments
 
As per Microsoft: "By design, a mailbox can be configured to limit or prohibit mailbox activity if limits are exceeded. You can modify the current setting on the Limits tab of a specific mailbox". See ME817225 and MSEX2K3DB for more details on this event.
Self-explanatory. A mailbox size limite was configured and the user has exceeded it. See ME259357 for more details.

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