Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.


This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This page may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.

Ends a MAPI session.

  ULONG_PTR ulUIParam,
  ULONG ulFlags,
  ULONG ulReserved


[in] A handle to the parent window of any dialog boxes or windows to be displayed. This parameter is ignored if the MAPI_LOGOFF_UI flag is not set.


[in] A bitmask of flags that control the logoff operation. The following flags can be set:


If this session is shared, all clients that logged on by using the shared session should be notified of the logoff in progress. The clients should log off. Any client that is using the shared session can set this flag. MAPI_LOGOFF_SHARED is ignored if the current session is not shared.


Logoff can display a dialog box during the operation, possibly prompting the user for confirmation.


[in] Reserved; must be zero.


The logoff operation was successful.

The IMAPISession::Logoff method ends a MAPI session. When Logoff returns, none of the methods except for IUnknown::Release can be called.

When Logoff returns, release the session object by calling its IUnknown::Release method.

For more information about ending a session, see Ending a MAPI Session.

For MFCMAPI sample code, see the following table.






MFCMAPI uses the IMAPISession::Logoff method to log off from the session before releasing it.

© 2015 Microsoft