Q:
Outlook 2007 extend.dat error
How do I recover from the following Outlook 2007 error message?
"An extension failed to initialize. Cannot open file: extend.dat. The file may not exist, you may not have permission to open it, or it may be open in another program. Right-click the folder that contains the file, and then click Properties to check your permissions for the folder. You don't have appropriate permission to perform this operation".
I am the administrator account for this personal laptop. I cannot find the extend..dat file anywhere on my hard drive.
"An extension failed to initialize. Cannot open file: extend.dat. The file may not exist, you may not have permission to open it, or it may be open in another program. Right-click the folder that contains the file, and then click Properties to check your permissions for the folder. You don't have appropriate permission to perform this operation".
I am the administrator account for this personal laptop. I cannot find the extend..dat file anywhere on my hard drive.
ASKED:
Apr 23 2009 4:11 AM GMT
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A:
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Then, try searching the file again, or go to 'C:\Documents and Settings\<user>\Local Settings\Application Data\Microsoft\Outlook' (this could be different depending on the OS version).
Make sure Outlook is not running. Rename the extend.dat file (to any other name). Restart outlook.
There is a Microsoft article with a similar solution here.
