Exchange - Known Issue: Error message when editing or sending a draft message


  • When composing a message in Outlook, if the message is left open for a long time it may pop-up one of the following error messages when you later try to edit, send or save it: 
    • "The function cannot be performed because the message has been changed"
    • "The operation failed. The messaging interfaces have returned an unknown error. If the Problem persists, restart Outlook."
    • "Cannot save draft because the message is closed."


  • Outlook
  • Exchange email


The cause of this issue is unknown.

The issue seems to occur more often in cases where a new message has been left open for a long time. 


There is no resolution to this issue at this time.

The work-around is to copy and paste the contents of the broken message to a new email.


For assistance, contact the Service Desk.


Article ID: 68135
Mon 12/3/18 3:58 PM
Thu 1/7/21 2:07 PM