Article ID: 2434502 - Last Review: August 29, 2011 - Revision: 6.1

Duplicate email messages appear in Outlook for Mac 2011

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SYMPTOMS

You receive duplicate email messages in Microsoft Outlook for Mac 2011.

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CAUSE

This problem can occur for the following reasons:

One or more rules are configured incorrectly.
An email server is down for maintenance.
Your Outlook database is corrupted.

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RESOLUTION

Step 1: Check your rules

Start Outlook.
On the Tools menu, click Rules.
Verify that each rule is correct.

The best way to pinpoint a problem with rules is to disable all your rules, and then re-enable the rules one at a time. To do this, follow these steps:

Start Outlook.
On the Tools menu, click Rules.
In the Name column, select a rule that you created.
Click to clear Enabled.
Repeat steps 3 and 4 until all rules have no Enabled option to clear.
Test Outlook.
If the issue is resolved, enable one rule at a time, and test Outlook after each step.

Step 2: Remove duplicate accounts

Start Outlook.
On the Tools menu, click Accounts.
If duplicate account names are listed, click a duplicate account, and then click the minus sign ("-") icon in the lower-left corner or press the Delete key on your keyboard to delete that account.

If there are no duplicate accounts, go to the next step.

Step 3: Rebuild the database

Rebuild the Outlook identity database. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

2360509 (http://support.microsoft.com/kb/2360509/ ) Rebuild the identity database to resolve problems in Outlook for Mac 2011

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