System configuration: Win2K pro, Outlook98 Corporate/Workgroup, token-ring network, max transmit frame size 1048, IE6, pop3 email account, Gateway brand PC.
Situation: E-mail received from Lotus Notes 5.x user can be seen as an line item in the Outlook98 inbox. When the user double-clicks to open the email, it “vanishes” from the inbox and is no longer on the Exchange server. This usually occurs when the Lotus Notes sender attaches a document. (We do NOT control the Exchange server. It is maintained by a separate state agency and the local telco.)
Research: I have looked at the MS KnowledgeBase and IBM Domino/Lotus Notes information database. The only incompatibility issues listed are between Outlook and Lotus Notes 4.x or older.
Attempted solution: I (re)installed the Corp/Workgroup features as suggested by MS. This did not solve the problem.