Step 2: Locate the ”Documents\Outlook Files” folder.
Step 3: Navigate to the path: HKEY_CURRENT_USER\Software\Microsoft\Office.0\Outlook, then right click on any blank area of the right-side pane, and then select New - Expandable String Value.
In case, if the above method fails to fix the issue, then your PST file gets corrupted.
Only a single version of Outlook can be installed at a time on a computer.When it comes to Outlook, there is no direct benefit of having the 64-bit edition instead of the 32-bit edition.For more information see: Should I install the 32-bit or 64-bit version of Office/Outlook?In this case, there could be an error or issue with Windows Indexing services.There could be many problems in Outlook 2016 responsible behind this issue and so are the resolutions.Note: In order to use some of the functionality in Outlook 2016, you’ll need to configure your Exchange account with Cached Exchange Mode enabled (CEM). For an overview of features requiring CEM see: Outlook 2010: New features and Cached Exchange Mode Microsoft still recommends installing the 32-bit edition of Office 2016 instead of the 64-bit edition unless you have a specific need that requires the 64-bit edition of Office 2016.