Here is how I recieve this error:
We've got some email template files which were saved in .msg format (Outlook Message format unicode) and the file properties were set to "Read Only". These templates are shared within our department, my team members can open and use them to send
emails with both Outlook 2007 and 2010 with no problems. Every time after they send the email, the content of the templates won't be modified. Because we need to send a lot of email with similar contents repeatly every day. But, the error shows
up as below while I sending the emails with them with Outlook 2010:
I've researched this issue last year with no luck. Any ideas?