EntryID unique?

  • Thread starter Thread starter Andreas Schachl
  • Start date Start date
A

Andreas Schachl

Hello!

Ive got a question concerning the EntryID of an object:

Is every EntryID unique and wont be used even if the object was deleted?

For example:
object a - entryid 1
object a is deleted
object b is created and gets entryid 1

So is every EntryID unique for any time?

Furthermore I wonder if there is a difference between using EntryIDs
with Outlook alone or in connection with Exchange Server?

Thanks in advance!

Andreas
 
Yes, it should be unique. EntryID's will change in an Exchange mailbox if
the item is moved or deleted. They don't change in a PST file. That's
transport dependent. Exchange also provides short-term and long-term
EntryID's, for a PST file you only get a long-term EntryID. So when using a
MAPI table for example you would check for both EntryID's to make sure you
get a valid result.
 
Ken said:
Yes, it should be unique. EntryID's will change in an Exchange mailbox if
the item is moved or deleted. They don't change in a PST file. That's
transport dependent. Exchange also provides short-term and long-term
EntryID's, for a PST file you only get a long-term EntryID. So when using a
MAPI table for example you would check for both EntryID's to make sure you
get a valid result.
Click to expand...

Thanks!

Does this mean that there is no way to "track" an item from another
application using its EntryID since if it is moved or deleted I wont
find it under its EntryID?

Thanks in advance!
 
Correct. I usually store the original entry id in a user defined field and
check on that so if EntryID changes my field remains the same.
 
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