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An extansion filed to initialize.  Can't open file: extend.dat. The file may not exist, you may not have permissions to open it, or it may be open in another program. Exchange 2003 MS E-mail

Posted on 2006-11-27
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Last Modified: 2012-05-05
Hello,
We have a user receiving this error in outlook 2003.  the user can access her exchange profile via other PC's and terminal server, but not this particular server.  We've not had other users having issues on this terminal server and we've got over 100 users on it.  Below is the error:

Thanks,
CEB&T


An extension filed to initialize.  Can't open file: extend.dat. The file may not exist, you may not have permissions to open it, or it may be open in another program.  Right click the folder that contains, and then click properties to check your permissions for the folder.  You don't have appropriate permissions to perform this operation.
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Expert Comment

by:Sirreal45
ID: 18023582
Delete extend.dat from c:\documents and settings\%username%\local settings\application data\microsoft\outlook

This may be in a different location if you have moved the profile to a location different from default.

The extend.dat file will be re-created next time outlook is opened.
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Author Comment

by:coloradoeastbankandtrust
ID: 18023598
Sorry, i forgot to add something.  After you click okay, it says:

Filed to register a VB Script DLL.  Reinstall or run RegSVR32.exe Vbscript.dll to self register

click okay again and it says the operation failed.  
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Author Comment

by:coloradoeastbankandtrust
ID: 18023704
Where is it located by defualt on exchange server?
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Author Comment

by:coloradoeastbankandtrust
ID: 18023787
Nevermind that, what i did was made her a domain admin, loged her in and i could open outlook fine.  i logged her out, took her out of that group, logged back in again and it now says: Word cannot open existing (normal)  

it opens outlook fine now but just says that...

? ? ? ?
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Expert Comment

by:Sirreal45
ID: 18023805
The extend.dat files are created on the local machines...thats why she can access her outlook profile fine on other machines.
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Sirreal45 earned 500 total points
ID: 18023811
Make sure the user has permissions on the ...\local settings\application data\microsoft\outlook folder as well.
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Author Comment

by:coloradoeastbankandtrust
ID: 18023876
Thats it, the folder permissions issue.  Thanks!!
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by:Sirreal45
ID: 18024010
Glad I could help :)
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