This file cannot be saved because some properties are missing or invalid. Use the Document Information Panel to provide the correct property values. Errors for required properties are marked with a red asterisk, and errors for invalid properties are marked with a red dashed border.

User has raised an incident ticket by mentioning that he is not able to save the word document and getting the below mentioned error message:

This file cannot be saved because some properties are missing or invalid. Use the Document Information Panel to provide the correct property values. Errors for required properties are marked with a red asterisk, and errors for invalid properties are marked with a red dashed border.

Configuration: SharePoint 2010, Word 2010, IE7.0, Windows 7 OS.

While researching on the same, I found one Microsoft KB which clearly states that this is a know issue and multiple workaround can be used to fixed the same. Here is the article based on the same:

http://support.microsoft.com/kb/981688

100% credit to this Microsoft KB which resolves our issue but I continued my RnD on the same and successfully reproduced the issue at my end also.

What also we can do apart from Microsoft KB?

§  Open the same document library which has the problem

§  Settings

§  Library settings

§  Content types

§  Hidden fields in the content types

§  Make the necessary fields options and check the results

I am pretty much confident that by using the above mentioned steps, we will be in a position to resolve the issue without any problems.

If you still face the same problem then please let me know so that we can troubleshoot and resolves the issue as soon as possible. Thank you.