The operation cannot be performed because the message has been changed

[John_Newton]

This "operation cannot be performed..." message is a serious problem and interferes with my work far too often. There doesn't appear to be any valid purpose for this annoyance. I have taken the actions described in your help messages to no avail.  Surely MS has a real and permanent solution for this problem.  Please help me remove the need to go back and recreate email messages.  

[#2]

Since writing this help message, I have found that MS is not answering any of the similar questions. I'm just wondering if MS support is just refusing to answer these legitimate questions. We all pay dearly to use MS products and we expect support when needed!!!

[#3]

Amen to that. This annoying problem has been going on for years.