Outlook mailbox size not updating
Of course, in most cases, your own mailbox does make up the large part of the ost-file but there is much more stored in there which can be quite big or even bigger as well!When you use Outlook 2013 or Outlook 2016, the ost-file can also actually be smaller than your mailbox.What is being stored in an ost-file also depends on whether you are using an Exchange or IMAP account or whether you are connecting to an mailbox via the Outlook Hotmail Connector or via Exchange Active Sync (EAS).First of all, the ost-file of an Exchange account is only a cache of data which is stored on the Exchange server(s).In general, the following is stored in the ost-file: In Outlook 2010 and previous, ost-files are also being used by Outlook Hotmail Connector accounts.In Outlook 2013 and Outlook 2016, Exchange Active Sync (EAS) and IMAP accounts use ost-files as well.Nonetheless, letting it grow unnecessarily large isn’t the way either."), Zf(c),c=c.inner HTML);var d=document.create Element("template");if("content"in d)d.inner HTML=c,d=d.content;elsec=document.create Tree Walker(d, Node Filter.
In addition, it acts as a foundation for several features in Outlook which couldn’t be used otherwise such as Instant Search, the People Pane and Conversation View.
Reducing the size of the ost-file isn’t always that easy and not always needed either.
If you are on a reasonably modern computer and are using Outlook 2007 SP2 or later, your ost-file can be as large as 10GB and you’d still won’t notice a performance hit.
This is due to some storage inefficiency of the ost-file and the way Exchange calculates the mailbox size (Exchange 2013 calculates it more accurately though).
When you use Outlook 2013 or Outlook 2016, the ost-file can actually be up to 30% smaller than the reported mailbox size.