Recently I was working with a MAPI developer and came across this interesting issue. We noticed their custom MAPI application takes 2 minutes to open the messages in a given mailbox. Further troubleshooting we noticed they see this behavior with the MAPI call, (lpFolder)->OpenEntry(). It takes 2 minutes to open messages in a given mailbox and there is no error thrown. In order to isolate we used latest MFCMAPI and MAPI notifications, but we failed to locally repro the issue with it. We enabled...(read more)![]()
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