Cached Exchange Mode - Pros & Cons

[Marty Leaf]

Could someone explain to me the pros & cons of using Cached Exchange Mode
with Outlook 2003 & Exchange 2003. I want junk mail filtering which I need
cached mode on, correct? I also want to setup multiple address books which I
need cached mode off, correct? All my users are on Desktop PCs, no laptops.
Why do I need cached mode if I am always connected to the server?

Any replies would be greatly appreciated.
Thank you,
Marty

 

[Patricia Cardoza - [MVP Outlook]]

You can have multiple address books with cached mode on.

Personally I love cached mode. If the server goes down I can still work,
rather than having Outlook hanging all the time. About the only major
disadvantage to cached mode is the fact that your users will have an OST
file on their local computers which takes up space. This really only becomes
an issue if they have very small hard drives.

Junk mail filtering does require cached mode to be turned on.

--
Patricia Cardoza
Outlook MVP
www.cardozasolutions.com

Author, Special Edition Using Microsoft Outlook 2003

***Please post all replies to the newsgroups***

 

[Terry Liu [MSFT]]

Hi Marty,

Outlook?2003 clients using Cached Exchange Mode perform most e-mail-related
tasks from the local client, reducing the number of requests to the server
for data and improving performance for items stored in the local copy of
the mailbox. After the full copy of a user mailbox and offline address book
is downloaded, Cached Exchange Mode significantly reduces network bandwidth
consumption for e-mail between the client and server. This greatly improves
the Outlook experience for remote or branch office users as well as removes
the need to restart Outlook to an offline profile when network
interruptions occur. While Cached Exchange Mode works with previous
versions of Exchange, additional improvements in compression and
performance between Outlook?2003 and Exchange?2003 make the user experience
even better.

Junk mail filtering does need Cached Exchange Mode enabled. However, you
may still use multiple address books when turning on Cached Exchange mode.
Personally, I do like this new feature in Outlook 2003 because I can focus
on my work when losing the connection to Exchange.

For your information: 831123 Changes to the Outlook 2003 Offline Address
Book -- http://support.microsoft.com/?id=831123 If you have any questions,
please feel free to post back!

Have a nice day!

Best regards,

Terry Liu
MCSE 2K MCSA MCDBA CCNA
Microsoft Online Support Engineer

Get Secure! - <www.microsoft.com/security>
=====================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
=====================================================
This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
60From: "Marty Leaf" <[email protected]>
60Subject: Cached Exchange Mode - Pros & Cons
60Date: Mon, 8 Mar 2004 15:57:26 -0500
60Lines: 11
60X-Priority: 3
60X-MSMail-Priority: Normal
60X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
60X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
60Message-ID: <[email protected]>
60Newsgroups: microsoft.public.outlook.general
60NNTP-Posting-Host:
66-208-231-43-ubr01b-malvrn01-pa.hfc.comcastbusiness.net 66.208.231.43
60Path: cpmsftngxa06.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP11.phx.gbl
60Xref: cpmsftngxa06.phx.gbl microsoft.public.outlook.general:216345
60X-Tomcat-NG: microsoft.public.outlook.general
60
60Could someone explain to me the pros & cons of using Cached Exchange Mode
60with Outlook 2003 & Exchange 2003. I want junk mail filtering which I need
60cached mode on, correct? I also want to setup multiple address books
which I
60need cached mode off, correct? All my users are on Desktop PCs, no
laptops.
60Why do I need cached mode if I am always connected to the server?
60
60Any replies would be greatly appreciated.
60Thank you,
60Marty
60
60
60

 

[Marty Leaf]

Thank you for your explanation! I will go with the cached mode.

Thanks again,
Marty

 

[Brian Tillman]

Personally I love cached mode. If the server goes down I can still
work, rather than having Outlook hanging all the time. About the only
major disadvantage to cached mode is the fact that your users will
have an OST file on their local computers which takes up space. This
really only becomes an issue if they have very small hard drives.

When MS changed the format of the PST to Unicode, did they do the same with
the OST?

 

[Terry Liu [MSFT]]

Hi Marty,

Thank you for taking the time to respond.

If you have any questions, please feel free to post back!

Have a nice day!

Best regards,

Terry Liu
MCSE 2K MCSA MCDBA CCNA
Microsoft Online Support Engineer

Get Secure! - <www.microsoft.com/security>
=====================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
=====================================================
This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
60From: "Marty Leaf" <[email protected]>
60References: <[email protected]>
<[email protected]>
60Subject: Re: Cached Exchange Mode - Pros & Cons
60Date: Tue, 9 Mar 2004 09:09:56 -0500
60Lines: 90
60X-Priority: 3
60X-MSMail-Priority: Normal
60X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
60X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
60Message-ID: <[email protected]>
60Newsgroups: microsoft.public.outlook.general
60NNTP-Posting-Host:
66-208-231-43-ubr01b-malvrn01-pa.hfc.comcastbusiness.net 66.208.231.43
60Path:
cpmsftngxa06.phx.gbl!cpmsftngxa09.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP10.
phx.gbl
60Xref: cpmsftngxa06.phx.gbl microsoft.public.outlook.general:216516
60X-Tomcat-NG: microsoft.public.outlook.general
60
60Thank you for your explanation! I will go with the cached mode.
60
60Thanks again,
60Marty
60
60
6060> Hi Marty,
60>
60> Outlook?2003 clients using Cached Exchange Mode perform most
60e-mail-related
60> tasks from the local client, reducing the number of requests to the
server
60> for data and improving performance for items stored in the local copy of
60> the mailbox. After the full copy of a user mailbox and offline address
60book
60> is downloaded, Cached Exchange Mode significantly reduces network
60bandwidth
60> consumption for e-mail between the client and server. This greatly
60improves
60> the Outlook experience for remote or branch office users as well as
60removes
60> the need to restart Outlook to an offline profile when network
60> interruptions occur. While Cached Exchange Mode works with previous
60> versions of Exchange, additional improvements in compression and
60> performance between Outlook?2003 and Exchange?2003 make the user
60experience
60> even better.
60>
60> Junk mail filtering does need Cached Exchange Mode enabled. However, you
60> may still use multiple address books when turning on Cached Exchange
mode.
60> Personally, I do like this new feature in Outlook 2003 because I can
focus
60> on my work when losing the connection to Exchange.
60>
60> For your information: 831123 Changes to the Outlook 2003 Offline Address
60> Book -- http://support.microsoft.com/?id=831123 If you have any
questions,
60> please feel free to post back!
60>
60> Have a nice day!
60>
60> Best regards,
60>
60> Terry Liu
60> MCSE 2K MCSA MCDBA CCNA
60> Microsoft Online Support Engineer
60>
60> Get Secure! - <www.microsoft.com/security>
60> =====================================================
60> When responding to posts, please "Reply to Group" via your newsreader so
60> that others may learn and benefit from your issue.
60> =====================================================
60> This posting is provided "AS IS" with no warranties, and confers no
60rights.
60>
60> --------------------
60> 60From: "Marty Leaf" <[email protected]>
60> 60Subject: Cached Exchange Mode - Pros & Cons
60> 60Date: Mon, 8 Mar 2004 15:57:26 -0500
60> 60Lines: 11
60> 60X-Priority: 3
60> 60X-MSMail-Priority: Normal
60> 60X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
60> 60X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
60> 60Message-ID: <[email protected]>
60> 60Newsgroups: microsoft.public.outlook.general
60> 60NNTP-Posting-Host:
60> 66-208-231-43-ubr01b-malvrn01-pa.hfc.comcastbusiness.net 66.208.231.43
60> 60Path: cpmsftngxa06.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP11.phx.gbl
60> 60Xref: cpmsftngxa06.phx.gbl microsoft.public.outlook.general:216345
60> 60X-Tomcat-NG: microsoft.public.outlook.general
60> 60
60> 60Could someone explain to me the pros & cons of using Cached Exchange
60Mode
60> 60with Outlook 2003 & Exchange 2003. I want junk mail filtering which I
60need
60> 60cached mode on, correct? I also want to setup multiple address books
60> which I
60> 60need cached mode off, correct? All my users are on Desktop PCs, no
60> laptops.
60> 60Why do I need cached mode if I am always connected to the server?
60> 60
60> 60Any replies would be greatly appreciated.
60> 60Thank you,
60> 60Marty
60> 60
60> 60
60> 60
60>
60
60
60

 

[Marty Leaf]

Question: I added a new user & mailbox to my domain/exchange. The new user
doesn't show up in the GAL for most of my users. When I take Outlook out of
Cache mode & reboot the new user shows up. If I put Outlook back in cache
mode the user is not in the GAL again. I added the new user over 24 hours
ago. How do I force the Cache to update?

-Marty

 

[Ken Slovak - [MVP - Outlook]]

Depends on which version of Exchange you are using. Exchange 5.5 only
supports ANSI OST files, 2000 or 2003 allow a Unicode OST file.

 

[Terry Liu [MSFT]]

Hi Marty,

Please refer to the two Knowledge Base articles:

831124 How to Force Outlook to Resolve Proxy Addresses and Custom
Properties in
http://support.microsoft.com/?id=831124
831123 Changes to the Outlook 2003 Offline Address Book
http://support.microsoft.com/?id=831123

This problem can occur if we are running OL2003 in Cached Exchange Mode.

When we are running in Cached Exchange Mode, we use the OAB instead of the
GC for
directory lookups.
By default, Exchange updates the OAB once every 24hrs, so clients running
OL2003 in
cached mode would not see any updates to the GAL until Exchange republishes
the
OAB.

If we turn off Cached Exchange Mode and close and reopen Outlook, we see
the full
GAL. However this is probably not a good solution for customer, so we
could do
either of the actions below:

We can change the schedule of how often OAB gets rebuilt by Exchange by
updating
its schedule and then having the client download the new OAB by doing
Tools->Send/Recieve->Download Address Book.

However, better solution may be to set registry value so that clients are
forced to
use GAL.

---
If you use Outlook 2003 in Cached Exchange Mode, Outlook 2003 automatically
downloads Offline Address Books to your local computer. This feature works
well for
remote and roving users. However, you may not want this feature available
for local
desktop users. In this case, set the following registry parameter to force
local
desktop users to use the Global Address List instead:

HKEY_CURRENT_USER \ Software \ Microsoft \ Office \ 11.0 \ Microsoft
Outlook \
Cached Mode
Parameter: DownloadOAB
Type: REG_DWORD
Value: 0x00000000


This value forces all directory requests to access the online Active
Directory
Global Address List.

Note: If Offline Address Book files have been already downloaded and
associated
with your MAPI profile, this setting will not have the correct effect. To
use
Cached Exchange Mode with a full online Active Directory, you must set this
parameter and remove any .oab files from the local computer.
---

Hope this information helps!

Have a nice day!

Best regards,

Terry Liu
MCSE 2K MCSA MCDBA CCNA
Microsoft Online Support Engineer

Get Secure! - <www.microsoft.com/security>
=====================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
=====================================================
This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
60From: "Marty Leaf" <[email protected]>
60References: <[email protected]>
<[email protected]>
<[email protected]>
<g#[email protected]>
60Subject: Re: Cached Exchange Mode - Pros & Cons
60Date: Wed, 10 Mar 2004 08:42:33 -0500
60Lines: 158
60X-Priority: 3
60X-MSMail-Priority: Normal
60X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
60X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
60Message-ID: <ueD#[email protected]>
60Newsgroups: microsoft.public.outlook.general
60NNTP-Posting-Host:
66-208-231-43-ubr01b-malvrn01-pa.hfc.comcastbusiness.net 66.208.231.43
60Path: cpmsftngxa06.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP10.phx.gbl
60Xref: cpmsftngxa06.phx.gbl microsoft.public.outlook.general:216825
60X-Tomcat-NG: microsoft.public.outlook.general
60
60Question: I added a new user & mailbox to my domain/exchange. The new user
60doesn't show up in the GAL for most of my users. When I take Outlook out
of
60Cache mode & reboot the new user shows up. If I put Outlook back in cache
60mode the user is not in the GAL again. I added the new user over 24 hours
60ago. How do I force the Cache to update?
60
60-Marty
60
60
6060> Hi Marty,
60>
60> Thank you for taking the time to respond.
60>
60> If you have any questions, please feel free to post back!
60>
60> Have a nice day!
60>
60> Best regards,
60>
60> Terry Liu
60> MCSE 2K MCSA MCDBA CCNA
60> Microsoft Online Support Engineer
60>
60> Get Secure! - <www.microsoft.com/security>
60> =====================================================
60> When responding to posts, please "Reply to Group" via your newsreader so
60> that others may learn and benefit from your issue.
60> =====================================================
60> This posting is provided "AS IS" with no warranties, and confers no
60rights.
60>
60> --------------------
60> 60From: "Marty Leaf" <[email protected]>
60> 60References: <[email protected]>
60> <[email protected]>
60> 60Subject: Re: Cached Exchange Mode - Pros & Cons
60> 60Date: Tue, 9 Mar 2004 09:09:56 -0500
60> 60Lines: 90
60> 60X-Priority: 3
60> 60X-MSMail-Priority: Normal
60> 60X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
60> 60X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
60> 60Message-ID: <[email protected]>
60> 60Newsgroups: microsoft.public.outlook.general
60> 60NNTP-Posting-Host:
60> 66-208-231-43-ubr01b-malvrn01-pa.hfc.comcastbusiness.net 66.208.231.43
60> 60Path:
60>
60cpmsftngxa06.phx.gbl!cpmsftngxa09.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP1
0.
60> phx.gbl
60> 60Xref: cpmsftngxa06.phx.gbl microsoft.public.outlook.general:216516
60> 60X-Tomcat-NG: microsoft.public.outlook.general
60> 60
60> 60Thank you for your explanation! I will go with the cached mode.
60> 60
60> 60Thanks again,
60> 60Marty
60> 60
60> 60
60> 6060> 60> Hi Marty,
60> 60>
60> 60> Outlook?2003 clients using Cached Exchange Mode perform most
60> 60e-mail-related
60> 60> tasks from the local client, reducing the number of requests to the
60> server
60> 60> for data and improving performance for items stored in the local
copy
60of
60> 60> the mailbox. After the full copy of a user mailbox and offline
address
60> 60book
60> 60> is downloaded, Cached Exchange Mode significantly reduces network
60> 60bandwidth
60> 60> consumption for e-mail between the client and server. This greatly
60> 60improves
60> 60> the Outlook experience for remote or branch office users as well as
60> 60removes
60> 60> the need to restart Outlook to an offline profile when network
60> 60> interruptions occur. While Cached Exchange Mode works with previous
60> 60> versions of Exchange, additional improvements in compression and
60> 60> performance between Outlook?2003 and Exchange?2003 make the user
60> 60experience
60> 60> even better.
60> 60>
60> 60> Junk mail filtering does need Cached Exchange Mode enabled. However,
60you
60> 60> may still use multiple address books when turning on Cached Exchange
60> mode.
60> 60> Personally, I do like this new feature in Outlook 2003 because I can
60> focus
60> 60> on my work when losing the connection to Exchange.
60> 60>
60> 60> For your information: 831123 Changes to the Outlook 2003 Offline
60Address
60> 60> Book -- http://support.microsoft.com/?id=831123 If you have any
60> questions,
60> 60> please feel free to post back!
60> 60>
60> 60> Have a nice day!
60> 60>
60> 60> Best regards,
60> 60>
60> 60> Terry Liu
60> 60> MCSE 2K MCSA MCDBA CCNA
60> 60> Microsoft Online Support Engineer
60> 60>
60> 60> Get Secure! - <www.microsoft.com/security>
60> 60> =====================================================
60> 60> When responding to posts, please "Reply to Group" via your
newsreader
60so
60> 60> that others may learn and benefit from your issue.
60> 60> =====================================================
60> 60> This posting is provided "AS IS" with no warranties, and confers no
60> 60rights.
60> 60>
60> 60> --------------------
60> 60> 60From: "Marty Leaf" <[email protected]>
60> 60> 60Subject: Cached Exchange Mode - Pros & Cons
60> 60> 60Date: Mon, 8 Mar 2004 15:57:26 -0500
60> 60> 60Lines: 11
60> 60> 60X-Priority: 3
60> 60> 60X-MSMail-Priority: Normal
60> 60> 60X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
60> 60> 60X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
60> 60> 60Message-ID: <[email protected]>
60> 60> 60Newsgroups: microsoft.public.outlook.general
60> 60> 60NNTP-Posting-Host:
60> 60> 66-208-231-43-ubr01b-malvrn01-pa.hfc.comcastbusiness.net
66.208.231.43
60> 60> 60Path:
cpmsftngxa06.phx.gbl!TK2MSFTNGP08.phx.gbl!TK2MSFTNGP11.phx.gbl
60> 60> 60Xref: cpmsftngxa06.phx.gbl microsoft.public.outlook.general:216345
60> 60> 60X-Tomcat-NG: microsoft.public.outlook.general
60> 60> 60
60> 60> 60Could someone explain to me the pros & cons of using Cached
Exchange
60> 60Mode
60> 60> 60with Outlook 2003 & Exchange 2003. I want junk mail filtering
which
60I
60> 60need
60> 60> 60cached mode on, correct? I also want to setup multiple address
books
60> 60> which I
60> 60> 60need cached mode off, correct? All my users are on Desktop PCs, no
60> 60> laptops.
60> 60> 60Why do I need cached mode if I am always connected to the server?
60> 60> 60
60> 60> 60Any replies would be greatly appreciated.
60> 60> 60Thank you,
60> 60> 60Marty
60> 60> 60
60> 60> 60
60> 60> 60
60> 60>
60> 60
60> 60
60> 60
60>
60
60
60

 

[Brian Tillman]

Depends on which version of Exchange you are using. Exchange 5.5 only
supports ANSI OST files, 2000 or 2003 allow a Unicode OST file.

Interesting. This is true even though it's Outlook creating the OST and not
Exchange? Well, I guess I don't need to worry about it because I'm
connected to Exchange 2000.

 

[Ken Slovak - [MVP - Outlook]]

Yes, because Outlook 2003 checks on the Exchange server version before it
creates an OST file and 5.5 knows nothing about Unicode OST files.

 

[Terry Liu [MSFT]]

Hi,

Thank you for your input!

Have a nice day!

Best regards,

Terry Liu
MCSE 2K MCSA MCDBA CCNA
Microsoft Online Support Engineer

Get Secure! - <www.microsoft.com/security>
=====================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
=====================================================
This posting is provided "AS IS" with no warranties, and confers no rights.

--------------------
60Reply-To: "Ken Slovak - [MVP - Outlook]" <[email protected]>
60From: "Ken Slovak - [MVP - Outlook]" <[email protected]>
60References: <[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
<[email protected]>
60Subject: Re: Cached Exchange Mode - Pros & Cons
60Date: Thu, 11 Mar 2004 14:20:55 -0500
60Lines: 28
60Organization: Slovak Technical Services, Inc.
60X-Priority: 3
60X-MSMail-Priority: Normal
60X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
60X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
60Message-ID: <[email protected]>
60Newsgroups: microsoft.public.outlook.general
60NNTP-Posting-Host: rrcs-se-65-34-21-202.biz.rr.com 65.34.21.202
60Path:
cpmsftngxa06.phx.gbl!TK2MSFTNGXS01.phx.gbl!TK2MSFTNGXA05.phx.gbl!TK2MSFTNGP0
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60Xref: cpmsftngxa06.phx.gbl microsoft.public.outlook.general:217278
60X-Tomcat-NG: microsoft.public.outlook.general
60
60Yes, because Outlook 2003 checks on the Exchange server version before it
60creates an OST file and 5.5 knows nothing about Unicode OST files.
60
60--
60Ken Slovak
60[MVP - Outlook]
60http://www.slovaktech.com
60Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
60Reminder Manager, Extended Reminders, Attachment Options
60http://www.slovaktech.com/products.htm
60
60
6060>
60> > Depends on which version of Exchange you are using. Exchange 5.5 only
60> > supports ANSI OST files, 2000 or 2003 allow a Unicode OST file.
60>
60> Interesting. This is true even though it's Outlook creating the OST and
60not
60> Exchange? Well, I guess I don't need to worry about it because I'm
60> connected to Exchange 2000.
60> --
60> Brian Tillman
60>
60
60
60