Could you please copy the subject of message here for the message which causes the exception. It would be helpful for us if you could also post/send the eml/msg file for detail testing. You may post here on forum or zip/send me via forum “Contact” --> “Send saqib.razzaq an email”.
I did some tests at my end but could not reproduce the problem. I will need to look at the emails to find out what is causing this problem.
I have not been able to get a sample email yet but I have semt you examples of the urls moving to and from which may be of some help.
Thanks for sending the sample URLs. I was able to get the exception when I included some of the non-English characters in subject and tried to move these messages.
I have logged this bug in our issue tracking system (ID: 15778). We will notify you when we make some progress to fix this. Sorry for the inconvenience.