====== Cached Exchange Mode ======

If you are having issues with **sluggish Outlook** with a Microsoft Exchange account, try enabling Cached Exchange Mode.

If you want to control **disk space utilization** on RDS servers, you probably want to disable Cached Exchange Mode.

===== Disable Cached Exchange Mode =====

Disable Cached Exchange Mode on a RDSH by adding a registry key.

For Outlook 2010:

HKEY_LOCAL_MACHINE/SOFTWARE/Policies/Microsoft/Office/14.0/Outlook/OST

In that key create a ''DWORD'' named ''NoOST'' and set the value to ''2''.

===== Enable Cached Exchange Mode =====

Here's how to configure Outlook for Cached Exchange Mode.

==== Outlook 2010 ====

In Outlook:

**File -> Account Settings -> Account Settings (drop list)**

Then:

**Email (tab) -> select Exchange account -> Change (button)**

Further:

**Exchange Server Settings (window) -> select Use Cached Exchange Mode (checkbox) -> Next**

You should be back at the Email Accounts window. **Click Finish**.

You should see a notification window that advises you to **restart Outlook** in order for the change to take effect.

When you re-launch Outlook, it will begin to make a copy of your Mailbox contents onto your local computer. This will take some time. Not all items will be immediately available. If you have a large mailbox or a slow Internet connection, this can take an hour or more.

==== Outlook 2007 ====

In Outlook, go to:

**Tools -> Account Settings -> Email (tab) -> Microsoft Exchange Server -> Change**

Then:

**Exchange Server Settings (window) -> select Use Cached Exchange Mode (checkbox) -> Next**

You should be back at the Email Accounts window. **Click Finish**.

You should see a notification window that advises you to **restart Outlook** in order for the change to take effect.

When you re-launch Outlook, it will begin to make a copy of your Mailbox contents onto your local computer. This will take some time. Not all items will be immediately available. If you have a large mailbox or a slow Internet connection, this can take an hour or more.