When an IMAP4 client is used to subscribe to a folder, the
folder name appear incorrectly on the client and the Exchange server.
If
an LSUB command is used to the Microsoft Exchange Server 2007 mailbox, the
folder names that are returned may include a question mark (?). For example,
you have a folder that is named AAA\�BBB, the incorrect response to the LSUB
command of AAA\?BBB could be sent. This can occur on any folders that contain
an extended character.
Note Microsoft Office Outlook Express and Windows Mail client do not
have this problem.
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This problem occurs because Exchange Server 2007 does not
encode the responses correctly in UTF-7 format. This issue happens as typically
an LSUB command is sent to the server to check upon subscription status. At
this point, Exchange responds with a wrongly encoded folder name and this can
cause a difference between the client and the server.
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To fix this problem, apply the following update rollup:
972076�
Description of Update Rollup 2 for Exchange Server 2007 Service Pack 2
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For more information about how to use the LSUB command in an
IMAP4 client, visit the following IETF Web site:
For more information about UTF-7 format, visit the following
IETF Web site:
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Microsoft
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section.
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