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Maximum number of rules per folder in the Inbox or in a public folder in Exchange Server 2003, Exchange 2000, and Exchange Server 5.5


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Summary

Microsoft Exchange Server can define rules to automatically operate on messages in the Inbox or in a public folder. There is a 32-kilobyte (KB) "packed data" memory limit for the rules on each folder in the Inbox or in a public folder. The reason for the memory limit is that the total sum of the information that is contained in a user's rules must fit in a remote procedure call (RPC).

Sometimes, you may receive the following error message when the number of rules exhausts the 32-KB memory limit:
changes to the rule could not be saved. There is not enough memory or the rules are too complex. Try deleting some rules.

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More information

The maximum number of rules depends on the size of the rules that are defined. Additionally, the amount of data that is required for a rule varies depending on the rule.

For example, a rule to move messages into a folder for a single recipient takes about 660 bytes. Therefore, there is no defined limit for the maximum number of rules that can be assigned to a folder. Typically, the limit is between 40 and 50 rules per folder.

For more information about the maximum number of rules per folder in the Inbox or in a public folder in Microsoft Exchange Server 2007, visit the following Microsoft Web site:

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Keywords: KB147298, kbenv

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Article Info
Article ID : 147298
Revision : 4
Created on : 10/29/2007
Published on : 10/29/2007
Exists online : False
Views : 601