Article ID: 278167 - View products that this article applies to.
This article was previously published under Q278167
If you open a second copy of your primary personal folder (.pst) file, you cannot close it. The menu command is unavailable.
To work around this behavior, remove the duplicate copy of the .pst file from your Mail profile:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.