Personal Folders files (PST files) are Outlook's
repositories for email, contacts, calendar information, and much
more. When you delete an item in Outlook, it is moved to the Deleted
Items folder, without freeing any space in your PST. After you
empty the Deleted Items folder, the size of PST will not change,
and leave “white spaces” within it, as a result of previous fragmentation
that it runs being a mini database. So, when you save items in
your PST, its size increases. When you remove items, it does not
decrease, but keeps the size thanks to those white spaces, unless
you compact the file.
Our backup process puts all existing
items in the order that ignores white spaces of the original PST
file, so the size of the destination PST may be different, usually
smaller, though it will contain all your data.
The procedure to compact the data
file might take several minutes or even hours depending on the
amount of deleted data. To compact a file, the following steps
need to be taken:
- On the File menu, click Data File Management. (Outlook
2010: File menu, click on Account Settings > Data files
tab)
- Click the data file that you want to compact, and then
click Settings.
- Click the Compact Now button.
Why
Exchange backup option is disabled? How could I enable it?
