send and receive gives this error and I am using Exchange 2010 User ID task reported error (0x8004010f)

Hi, Sounds like a problem with the offline address book. This might help: http://technet.microsoft.com/en-us/library/cc411331(EXCHG.80).aspx Leif

Hi Here's another link that can help you troubleshooting this problem.. http://msexchangeteam.com/archive/2007/04/19/437902.aspx Jonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

seems to be quite a generic error

Yes it is, check both links posted above they should help you troubleshoot this problem Jonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

Does the issue occur on certain user mailbox or each user mailbox? Is the machine in a domain? This issue can occur if the client is not a member of a domain. To resolve the issue, you should add an A record in DNS and point to the Exchange 2010 server. The detail suggestion is already provided in Leif’s article. Thanks. Novak Wu-MSFT