This article was previously published under Q192980
IMPORTANT: This article contains information about modifying the registry. Before you
modify the registry, make sure to back it up and make sure that you understand how to restore
the registry if a problem occurs. For information about how to back up, restore, and edit the
registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 (http://support.microsoft.com/kb/256986/EN-US/) Description of the Microsoft Windows Registry
NOTE: The procedures in this article only apply if you have installed Outlook with the Corporate or Workgroup option. With this option, you can use Messaging Application Programming Interface (MAPI) services. To determine your installation type, click About Microsoft Outlook on the Help menu. If you have the Corporate or Workgroup installation, you see "Corporate or Workgroup".
On This Page
SYMPTOMS
If you connect to your Microsoft Exchange Server remotely, you may notice a delay of several minutes before you can
use Outlook. During this time, Outlook is downloading your calendar data to
your local hard disk drive. This may be true even if you have chosen not to use
an offline store file (.ost).
For more information on the calendar-caching feature, please see the
following article in the Microsoft Knowledge Base:
196993 (http://support.microsoft.com/kb/196993/EN-US/)
OL20: (CW) Outlook Speed Enhancement to Calendar Folder
Outlook caches your calendar information to your local hard disk
drive by default. This allows you faster access to the calendar data when you work
primarily online with your mail server.
You can discontinue this caching process by either of two means. You can
turn off offline use by modifying the Exchange Server properties
or you can add a Windows registry entry to control offline use.
Click to select the Microsoft Exchange Server, service and click
Properties.
3.
On the Advanced tab, click Offline Folder File Settings.
4.
Click Disable Offline Use, and click Yes to the warning.
5.
Make sure that the option Enable Offline Use is now unavailable (grayed out).NOTE: You must disable offline use as described; it is not effective to only click to clear this check box.
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may
require you to reinstall your operating system. Microsoft cannot guarantee that you can solve
problems that result from using Registry Editor incorrectly. Use Registry Editor at your own
risk.
1.
Quit Outlook.
2.
click the Start button, click Run, type regedit and click OK.
If the Outlook key has a sub-key named OST with a NoOST entry, skip
to step 8. Otherwise, right-click the Outlook key and on
the shortcut menu, point to New and click Key.
5.
Type OST as the name for the new key and press ENTER.
6.
Right-click the new OST key and on the shortcut menu, point to New and
click DWORD Value.
7.
Type NoOST as the name for the new entry and press ENTER.
8.
Right-click the NoOST entry and on the shortcut menu, click Modify.
9.
Enter one of the following values:
0 = An offline store will be set up by default and used for calendar
caching. Also, the user will be allowed to enable offline access
and use the offline store. This is the same as the absence
of the OST key and NoOST entry.
1 = An offline store will be set up by default and used for calendar
caching. However, the user will NOT be allowed to enable offline
access and use the offline store. The options in the Microsoft
Exchange Server properties will not be available.
2 = An offline store will NOT be setup by default and the user will
NOT be allowed to enable offline access and use the offline store.
The options in the Microsoft Exchange Server properties will not be
available.
Need More Help? Contact a Support professional by E-mail, Online or Phone.
Customer Service For non-technical assistance with product purchases, subscriptions, online services, events, training courses, corporate sales, piracy issues, and more.
Newsgroups Pose a question to other users. Discussion groups and Forums about specific Microsoft products, technologies, and services.
Help and Support
Back to the top
