I have a user who we have switched from exchange (on an SBS2008 domain) to Hosted exchange
The user is still attached to the domain where the previous exchange server still resides but does not use the email facility of that mail server. Instead the domain MX records have been pointed to an external mail server supporting POP3 and Hosted Exchange.
His email is working fine on hosted exchange, he can access from multiple devices no problem. However on his main office PC his Autocomplete feature is behaving weirdly - Everytime he tries to send email to an internal user the message is returned undelivered. The bounce message indicates it is trying to send through the previous exchange server.
I've tested the Roamcache file using some software called nk2edit and I can see that the internal addresses are stored under EX instead of SMTP - Even if I delete these out (there are only 10-15) and save the Roamcache file next time we try to send to an internal user again it overwrites the Roamcache with the previous version and all EX users return.
I think the obvious answer is that for some reason the previous mail server is interfering, is there a way I can remove that mail server from the equation without losing it as an archive?