Many thanks for your reply Diane!
No, as far as I can make out there is nothing different about the users' accounts. No delegations, same server, no smartphones - all mails being read on a PC. All part of the same user group as far as I know....:(
It's happening to the same users all the...
I wonder if anybody can help.
I have written an Access 2010 database which, as part of its functionality, creates .ics files to be attached to e-mails and sent to users via Exchange server.
This works fine. The VBA creates the .ics files, writes an e-mail, attaches the .ics file...