Where is extend.dat located

Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message. What specifically do each of these files do and what is actually being deleted when resetting these files?

Looks like the only data that would be lost after resetting these files are pointer to add-ins, customized toolbar settings, and custom form settings. This is an old post but i am hoping someone out there stumbles upon this shortly.

Office opens up and after loading stops working. It was causing issues, so you don't need it to run Outlook. It's one of those extraneous files I believe that Outlook creates, but I don't think it is necessary otherwise Symantec would not tell you to delete it if you are using SAV or Total Protection. Yes, it is also a hidden file as was mentioned here as well.

Don't know what to say. MS recommends renaming or deleting, the Outlook will recreate the file. IDK, maybe a hail mary. Since Outlook it is stored in the Unicode format and its location changed from the Proof folder to the UProof folder.

This is a shared file between other Office applications. The file can be edited via the spell check options in the Office applications that use it or directly via Notepad. The is replace with the localized language ID number for the language it applies to. For instance, the English version is named MSO You can find an overview of the numbers here.

The file can be edited via the AutoCorrect options in the Office applications. Possible Location: Roaming Office Settings offitems. When all the latest changes have been committed to the mailbox, then you can safely remove these files without losing data. The file outitems. Not needed Location: Forms Roaming outlook. You should really use the Contacts folder for that. If you like to keep the cached information, you can migrate this file between machines as long as you rename the file after the name of the mail profile and the version of Outlook is the same.

However, corruption of the file could break the mail profile or vice versa. In that case the mail profile should be recreated. A corruption of the file can lead to loss of these configuration settings, being unable to remove certain folders or wrong folders showing up in the described sections. Rename it or delete it to recover. Some keys will refer to folder paths on the local machine or contain other local data such as the machine name. When you filter out these keys, then you can migrate this registry hive to another machine.

The settings Outlook save here usually depend on components from other or generic Office applications. As long as you heavily filter this registry hive, then you can migrate the remaining settings. Since these keys are created when the add-ins are installed, there is no need to migrate this key.

This key should be removed then. These keys have a very high interrelation with each other and heavily depend on exact file locations on the local machine. Due to this, small errors in this registry hive could lead to a fully non-functional Outlook until the mail profile is recreated.

While you can make a backup of this registry hive for local use, due to the reasons above and because of most settings in this hive are stored in hexadecimal values, it is not recommended to try to migrate the mail profiles to another machine.

For this, it is recommended to use a backup application suitable for mail profile migration or manually recreate it. Migrating this key is not possible but removing this key can solve account password issues on Windows XP. It is used to pre-fill some dialogs like the username for the login dialog and caches some other settings. There is no need to backup this hive or migrate it to another machine but it can come in handy in certain scenarios to pre-write the LogonDomain and UserName registry key to increase first-use experience for end-users.

Since all of the options are system wide, these settings are not directly exposed to the end-user via the Outlook interface so it is very unlikely that any changes have been applied to this hive after installation.

Therefore, there is no need to migrate this hive. Only when you are developing Form regions for yourself and have manually added the keys , then it would be recommended to make a backup of the hive.

In all other cases, it will be recreated automatically when you reinstall or reregister the Form Region. Unless you made any explicit changes to it yourself, there is no need to migrate this hive.

If you did make changes here, then only migrate the settings that you have actually changed. The hive is small enough to go through it manually. As these keys are automatically created by the installed ECE, there is no need to migrate this hive. Share on Facebook Share on Twitter Share by e-mail. What do the Outlook Icons Mean?

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