The Outlook API wrongfully shows an outlook folder to have zero sub-folders

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outlooklover

New Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
Hello,

I have a random issue where moving a MailItem to a sub-folder (uner the same Exchange Store)
FAILS from time to time.

The real issue is that Outlook stops "seeing" sub-folders under the "\\DRK\DefaultInbox\".
* It basicaly shows the "DefaultInbox" sub-folder to have "zero" sub-folders.

** VBA and VBNET- same phenomemon.

By thwe way, Redemption does not have this issue.


Sample and edited code from slipstick.com :
FolderPath = \\DRK\DefaultInbox\CannoSeeThis"

FoldersArray = Split(FolderPath, "\")
Set oFolder = Application.Session.Folders.item(FoldersArray(0))
If Not oFolder Is Nothing Then
For i = 1 To UBound(FoldersArray, 1)
Dim SubFolders As Outlook.Folders
Set SubFolders = oFolder.Folders <<<< The error will happen here for "DefaultInbox"
Set oFolder = SubFolders.item(FoldersArray(i))
If oFolder Is Nothing Then
Set GetFolderPath = Nothing
End If
Next
End If


I investigated more and it seems that when the issue happens, the EntryId of the "DefaultInbox" folder is WRONG .

It can be seen by the following experiment-

* Just for testing, I requested (Outlook native code) the folder using the CORRECT entryid (and storeid) :

Set ns = Application.GetNamespace("MAPI")
Set oFolder = ns.GetFolderFromID("000000001558C00B64527A4E83C186E33FCE9CCF018018D07E87680CDD48B628CC1483CA3B1B00001BAEBE590100", _
"0000000038A1BB1005E5101AA1BB08002....")

* However, what I got is a folder with a DIFFERENT entryid-

?oFolder.EntryID
000000001558C00B64527A4E83C186E33FCE9CCF010018D07E87680CDD48B628CC1483CA3B1B00001BAEBE590000


** The difference are small:

*** at the end- 90100 (good one) VS 90000 (bad one).

*** in the middle- F018018 vs F010018 .


The issue almost seems like a some kind of security feature that "acts out" from time to time.



Thanks in advance

OutlookLover
 

Diane Poremsky

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
I asked Dimtry (Redemption author) about it - he said this:

I have seen similar issues with Outlook losing the Drafts folder – everything looks normal, but inline replies break: select a different message, come back, but the inline response is silently gone. And GetDefaultFolder(olFolderDrafts) raises an exception. Outlook restart helps.

And you can’t compare the entry ids one bit at a time: there are some flags inside, but OutlookSpy parses them:

abFlags[0]: 00

abFlags[1]: 00

abFlags[2]: 00

abFlags[3]: 00

muid: 5E81754F003E1549B0659F2AEA92E7C2 ({4F75815E-3E00-4915-B065-9F2AEA92E7C2})

Type: 0x0001 (eitLTPrivateFolder)

DatabaseGUID: C7CF2304C77BF64585E8892DD6FF7BAC ({0423CFC7-7BC7-45F6-85E8-892DD6FF7BAC})

GlobalCounter: 0xB62000000000

Pad: 0x0000
 
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