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This policy setting allows you to determine whether users can open, view, edit, or save Word files with the format specified by the title of this policy setting.

If you enable this policy setting, you can specify whether users can open, view, edit, or save files.

The options that can be selected are below. Note: Not all options may be available for this policy setting.

- Do not block: The file type will not be blocked.

- Save blocked: Saving of the file type will be blocked.

- Open/Save blocked, use open policy: Both opening and saving of the file type will be blocked. The file will open based on the policy setting configured in the "default file block behavior" key.

- Block: Both opening and saving of the file type will be blocked, and the file will not open.

- Open in Protected View: Both opening and saving of the file type will be blocked, and the option to edit the file type will not be enabled.

- Allow editing and open in Protected View: Both opening and saving of the file type will be blocked, and the option to edit will be enabled.

If you disable or do not configure this policy setting, the file type will not be blocked.

File block setting:

0. Do not block
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\15.0\word\security\fileblock
   Value Name	htmlfiles
   Value Type	REG_DWORD
   Value	0

1. Save blocked
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\15.0\word\security\fileblock
   Value Name	htmlfiles
   Value Type	REG_DWORD
   Value	1

2. Open/Save blocked, use open policy
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\15.0\word\security\fileblock
   Value Name	htmlfiles
   Value Type	REG_DWORD
   Value	2

3. Block
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\15.0\word\security\fileblock
   Value Name	htmlfiles
   Value Type	REG_DWORD
   Value	3

4. Open in Protected View
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\15.0\word\security\fileblock
   Value Name	htmlfiles
   Value Type	REG_DWORD
   Value	4

5. Allow editing and open in Protected View
   

   Registry Hive	HKEY_CURRENT_USER
   Registry Path	software\policies\microsoft\office\15.0\word\security\fileblock
   Value Name	htmlfiles
   Value Type	REG_DWORD
   Value	5