I know this is an Exchange 2013 forum but i can;t seem to locate the 2010 forum.
We recently migrated over to exchange 2010 from 2003 and everything went well until emails were delayed when being delivered to outlook clients. Sometimes up to 15 mins. OWA and ActiveSync clients receive their emails instantly. I know the delay takes this long because i see it arrive in my phone and then i wait for it to arrive into outlook. i even disabled Cached mode and we still experience delay issues.
Exchange is a single multi role install VM with ScanMail Trend Micro.
Am i missing something here?