Article ID: 2544246 - View products that this article applies to.
Consider the following scenario:
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.
To resolve this issue, install the following update rollup:
(https://support.microsoft.com/kb/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.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about notifications when other users receive or read an email message, visit the following Microsoft website:
General information about notifications when other users receive or read an email messageFor more information about the SuppressReadReceipt flag, visit the following Microsoft website:
General information about the SuppressReadReceipt flag
Article ID: 2544246 - Last Review: November 5, 2011 - Revision: 2.0