Seems BES 5.0 Service pack 1 has an issue with BlackBerry Contacts. RIM have released a Knowledge base article on how to resolve this:EnvironmentBlackBerry® Enterprise Server version 5.0.1 Bundle 72 for Microsoft ExchangeBlackBerry® Enterprise Server version 5.0.1 Bundle 72 for IBM Lotus DominoIssue Number 466385OverviewAfter upgrading the BlackBerry Enterprise Server to 5.0.1 (bundle 72) some [...]
More...