Hi,

I need to track messages in a database, but be able to handle the same
message being sent to multiple recipients (within an Exchange environment).

I know that all messages sent to multiple recipients will have the same
MessageID value, but I can find no information as to how to retrieve it.

What I'm planning is that when a message is opened, an AddIn will check
whether the message has already been handled and if not, store info in a
database (simplistic view). When another user reads the same message, I need
to be able to detect that it's already been handled.

Thanks for any help,

Phil.

I think what you want is the EntryID of the item, which is accessible from
the Outlook object model or from other API's like CDO 1.21 or Extended MAPI.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"Bickers" wrote in message
...
Hi,

I need to track messages in a database, but be able to handle the same
message being sent to multiple recipients (within an Exchange
environment).

I know that all messages sent to multiple recipients will have the same
MessageID value, but I can find no information as to how to retrieve it.

What I'm planning is that when a message is opened, an AddIn will check
whether the message has already been handled and if not, store info in a
database (simplistic view). When another user reads the same message, I
need
to be able to detect that it's already been handled.

Thanks for any help,

Phil.

Hi Ken,

I was under the impression the EntryID can change. I need the ID that was
assigned to the message when it was sent.

There is a MessageID in the internet headers, but will that be present in a
message sent via Exchange ?

Cheers,

Phil.

"Ken Slovak - [MVP - Outlook]" wrote:

I think what you want is the EntryID of the item, which is accessible from
the Outlook object model or from other API's like CDO 1.21 or Extended MAPI.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"Bickers" wrote in message
...
Hi,

I need to track messages in a database, but be able to handle the same
message being sent to multiple recipients (within an Exchange
environment).

I know that all messages sent to multiple recipients will have the same
MessageID value, but I can find no information as to how to retrieve it.

What I'm planning is that when a message is opened, an AddIn will check
whether the message has already been handled and if not, store info in a
database (simplistic view). When another user reads the same message, I
need
to be able to detect that it's already been handled.

Thanks for any help,

Phil.

EntryID can change if an item is moved, it depends on the store provider.
Internet Message ID's in the headers aren't there in intra-organizational
Exchange emails, only on emails sent via the Internet.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"Bickers" wrote in message
...
Hi Ken,

I was under the impression the EntryID can change. I need the ID that was
assigned to the message when it was sent.

There is a MessageID in the internet headers, but will that be present in
a
message sent via Exchange ?

Cheers,

Phil.

If you mean the MIME message id header, it is not guaranteed to be present.
If it is available, it will be in the PR_INTERNET_MESSAGE_ID property
(0x1035001E), accessible using Extended MAPI (C++/Delphi only), CDO 1.21,
Redemption or MailItem.PropertyAccessor in Outlook 2007

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Bickers" wrote in message
...
Hi,

I need to track messages in a database, but be able to handle the same
message being sent to multiple recipients (within an Exchange
environment).

I know that all messages sent to multiple recipients will have the same
MessageID value, but I can find no information as to how to retrieve it.

What I'm planning is that when a message is opened, an AddIn will check
whether the message has already been handled and if not, store info in a
database (simplistic view). When another user reads the same message, I
need
to be able to detect that it's already been handled.

Thanks for any help,

Phil.

Thanks Dmitry.

Is that the MessageID visible in the headers of a message ?

What about a message sent via Exchange (ie within an organisation, without
going out to the internet) ? Does Exchange assign an ID to sent messages ?

Cheers,

Phil.

"Dmitry Streblechenko" wrote:

If you mean the MIME message id header, it is not guaranteed to be present.
If it is available, it will be in the PR_INTERNET_MESSAGE_ID property
(0x1035001E), accessible using Extended MAPI (C++/Delphi only), CDO 1.21,
Redemption or MailItem.PropertyAccessor in Outlook 2007

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Bickers" wrote in message
...
Hi,

I need to track messages in a database, but be able to handle the same
message being sent to multiple recipients (within an Exchange
environment).

I know that all messages sent to multiple recipients will have the same
MessageID value, but I can find no information as to how to retrieve it.

What I'm planning is that when a message is opened, an AddIn will check
whether the message has already been handled and if not, store info in a
database (simplistic view). When another user reads the same message, I
need
to be able to detect that it's already been handled.

Thanks for any help,

Phil.

AFAIK as of Exchange 2000 (or was it 2003?), the id will be set on the
messags sent by an EX server.

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Bickers" wrote in message
...
Thanks Dmitry.

Is that the MessageID visible in the headers of a message ?

What about a message sent via Exchange (ie within an organisation, without
going out to the internet) ? Does Exchange assign an ID to sent messages ?

Cheers,

Phil.

"Dmitry Streblechenko" wrote:

If you mean the MIME message id header, it is not guaranteed to be
present.
If it is available, it will be in the PR_INTERNET_MESSAGE_ID property
(0x1035001E), accessible using Extended MAPI (C++/Delphi only), CDO 1.21,
Redemption or MailItem.PropertyAccessor in Outlook 2007

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Bickers" wrote in message
...
Hi,

I need to track messages in a database, but be able to handle the same
message being sent to multiple recipients (within an Exchange
environment).

I know that all messages sent to multiple recipients will have the same
MessageID value, but I can find no information as to how to retrieve
it.

What I'm planning is that when a message is opened, an AddIn will check
whether the message has already been handled and if not, store info in
a
database (simplistic view). When another user reads the same message, I
need
to be able to detect that it's already been handled.

Thanks for any help,

Phil.