We have 2 users in the office set up on BIS.
1 user has been repeatedly (every couple of months) complaining he re-receives old e-mails to his handset - on a gmail account.
The 2nd user has never been affected, so I`ve never given it much consideration, until today:
This user has a privately hosted POP3 account which just 're-received' all messages he had received on 1 particular account between 20 August 2009 and 20 October 2009 on their handset.
The messages have not been 're-received' in his mailbox (checked via Outlook & a webmail interface).
Outlook is set to leave messages on the server.
This user has 5 mail accounts on his handset & it only happened to 1 of them.
3 of the other 4 accounts are hosted in the same manner as the affected one & with the same hosting company - 1 other account is even on the same domain too.
No changes or migrations were done to the .pst Outlook file.
I have just re-sent the service books to the user and will monitor the situation, what else can I troubleshoot or check to attempt to avoid this happening again?