OST file grows each time each time there's movement (Read, Receive, or moving email) in Outlook 2010

We have one user using Outlook 2010, ost grows from 9GB (initially = same size with mailbox through OWA)to 100GB in less than 5 days, each movement or transaction made at outlook, OST will grows where each day can be 20GB in differences. Office updates being patched.

Can anyone assist?




  • Edited by Oscarcwk Friday, September 11, 2015 4:28 AM
September 11th, 2015 4:26am

Hi,

Do you have some shared mailboxes or public folders opened in your Outlook profile? If so, data in the shared mailboxes or public folders may also be cached to your OST file. If you don't want these data to be cached, you can disable the "Download shared folders" and "Download Public Folder Favorites" under Account Settings > More Settings > Advanced tab:

Regards,

Steve Fan
TechNet Community Support

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September 13th, 2015 10:57pm

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