Start low - and you can increase it as you validate it if you need too.
Microsoft is conducting an online survey to understand your opinion of the Technet Web site.
During the process, if you come across any situations like Outlook 2010 PST file corruption or don’t have backup of Outlook 2010 PST file data, you can make use of Yodot Outlook PST Repair software.
Outlook 2010 PST file repair software: Yodot Outlook PST Repair is competent tool well-organized with superior modules and advanced algorithms, which helps to resolve issues when Outlook 2010 inbox not updating automatically on Windows computer.
In case this method is not succeeded, you might have configured PST file improperly in Outlook 2010.