PRB: Mapi Session Control and Exchange May Cause Errors (138311)

SYMPTOMS

Using the MAPI Session Control that comes with Visual FoxPro 3.0 and Exchange that comes with Windows 95 may result in the following error when you attempt to log on:

OLE Idispatch exception code 0 from MSMAPI32: Login has failed

The following error occurs if the LogonUI property is set to false (.F.):

The profile name is incorrect.

This warning appears if anything other than the profile name is entered into the Username property. The Password property is ignored.

CAUSE

The Mapi.ocx file that ships with Visual FoxPro 3.0 is only compatible with Microsoft Mail, not with Exchange. The Mapi.ocx file and Microsoft Mail use an earlier version of MAPI, whereas Exchange uses MAPI version 1.0.

WORKAROUND

To work around this incompatibility, do one of the following:

Have a session of Exchange currently running; then the error messages will not appear.
Place the profile name in the Username property. This avoids the warning message of "Invalid Profile name" and the Logon prompt for MS Exchange.
Use OLE Messaging by using OLE Automation to MAPI.

For more information about using the OLE Messaging object, please see the September 1995 Microsoft Developer Network (MSDN) Level II CD-ROM compact disc, which contains the MAPI software development kit (SDK) and files necessary to get OLE Messaging to work with Visual FoxPro.

STATUS

Microsoft is researching this behavior and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

Steps to Reproduce Behavior

Create a new form, and add MAPI Session Control to the form.
Right-click the icon for the MAPI Session Control, and choose properties.
Clear the LogonUI check box, and select the NewSession check box.
Run the form. At this point, an error message appears.