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You receive an NRN of a meeting request 120 days after the recipient accepted the request in an Exchange Server 2010 SP1 environment

SYMPTOMS
Consider the following scenario:
  • You request a read receipt for all sent email messages in a Microsoft Exchange Server 2010 Service Pack 1 (SP1) environment.
  • You send a meeting request to a recipient.
  • The recipient accepts the meeting request.
In this scenario, you receive the following non-read notification (NRN) unexpectedly after 120 days have passed:

From: <Sender>

Sent: <Date, Time>

To: <Receiver>

Subject: Not read: <Subject>

Your message was deleted without being read on <Date, Time>.

CAUSE
This issue occurs because the SuppressReadReceipt flag is not used when the Microsoft Exchange Mailbox Assistants service deletes the expired calendar items. The calendar logging feature generates messages in the recoverable items root folder when a user accepts a meeting request that includes a read receipt.

After 120 days, the Microsoft Exchange Mailbox Assistants service deletes the messages in the recoverable items root folder. This generates one or more NRNs if the SuppressReadReceipt flag is not used.
RESOLUTION
To resolve this issue, install the following update rollup:
2608646 Description of Update Rollup 6 for Exchange Server 2010 Service Pack 1

Note The NRNs are not completely flushed until 120 days have passed after the hotfix is installed.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
MORE INFORMATION
For more information about notifications when other users receive or read an email message, visit the following Microsoft website:
For more information about the SuppressReadReceipt flag, visit the following Microsoft website:
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Article ID: 2544246 - Last Review: 11/05/2011 01:26:00 - Revision: 2.0

Microsoft Exchange Server 2010 Service Pack 1

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