The Windows Messaging Subsystem settings for Outlook mail profiles are
mostly in Unicode, so you can't do a simple search to find references to a
particular account.
The OMI Account Manager settings are for Outlook Express, which sort of
makes sense, given that OE and OL2000 IMO used the same kind of account
definitions.
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I thought the accounts for OE were stored under
"HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts".
That's where they appear when I create accounts in OE. As a test, I created
a new dummy account in OE. Before I added the dummy account, I used
InstallWatch to take a snapshot. I created the new dummy account. I ran an
analyze in InstallWatch to see what changed. The result was a new
hexadecimal 8-digit named registry key for the account's setting under:
HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
The OMI Account Manager key didn't get changed. I then did a similar test
in Outlook to create a dummy account. The registry keys that changed
(added) were under:
HKEY_CURRENT_USER\Software\Microsoft\WindowsNT\Windows Message
Subsystem\Profiles\<myprofilename>
Hmm, interesting. Makes me wonder what the OMI Account Manager settings are
used for and who creates them. When tested by adding a new account, neither
Outlook or Outlook Express created or modified any keys under the OMI
Account Manager key. When I did a lookup at Microsoft KB support site on
"OMI Account Manager", I saw references to older versions of Outlook so
maybe this key gets syncrhonized to the Windows Message Subsystem key for
backwards compatibility, but I don't know when that synchronization occurs
since it didn't happen when I created a new dummy account in Outlook (or in
Outlook Express).
As of OL2002, Microsoft had not yet provided a means of exporting the
accounts (so they could be recovered later). Did Microsoft do anything yet
in OL2003 to let users backup their e-mail account settings? Office 2002
came with a "Save My Settings" wizard tool but it saves settings across all
Office components and doesn't let the user specify which settings to save
nor which settings to restore (i.e., you save all, you restore all, even if
you only are interest in some settings and don't want to step atop any
others). I haven't tried it to see if it save the Outlook account settings,
too.