How to clear the Outlook autocomplete cache Print

There are 2 ways of fixing this issue: #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

Easy method:

1. Start typing the email address you would like to clear from the cache until outlook displays it .
2. Press the down arrow key to select the email address
3. Press the delete button.

More involved method:

Note: It will allow you to clear all the entries from the address cache. (outlook.nk2)

1. Close Outlook and make sure it is not running using the task manager.
2. Open Windows Explorer and Paste %APPDATA%\Microsoft\Outlook into the address bar.
3. Delete the file Outlook.nk2.

 Outlook 2010 only:

Go to File, Option, Mail, and then click on the Empty Auto-Complete List button under the Send Messages header.

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