3) Here was my problem: Service account has incorrect rights in Exchange.Our service account was a member of the domain admins group.

From my experience, this is the result of at least one but up to all of the following being true: 1) is not registered.

This page from BB tells you which version of matches which version of mapi32 matches which version of Exchange.

I and one other guy use the 8700, he hasn't mentioned any issues. Sorry for the late reply, but I don't get on this site that often. I have confirmed that is also present on the BES Server. We are running Exchange 2003 on Windows Server 2003 Enterprise Bes 4.1 on Server 2003 Standard.1) is registered in the Bin subfolder under the Exchsrvr folder, correct? DLL: 6.5.7638.2 (C:\WINNT\system32\cdo.dll) Where is supposed to have to be the MAPI32 and EMSMDB32 files on the BES?

Please explain in full the issue you're having (appointments created in Outlook not synching to blackberry, or vice versa, or both..), what version of BES, Exchange, etc... later Adam I am also having an issue with my 8700 updating my outlook 2007 calendar through cellular connection. I have also confirmed that the service account has full admin rights to the exchange server (had to add that) and restarted the exchange store. 2) Do appointments made/edited in Outlook not synch to the blackberry, or vice versa, or both? I run this BB tool on the BES and tell me this: [MAPI_SUBSYSTEM] MAPI32.

I get updated appointments on my bb from outlook but not the other way. nearly everyone in my company uses bb's of various models and all on verizon. 3) Any notable errors in the Application Event Log on the blackberry server?

I and one other guy use the 8700, he hasn't mentioned any issues. 4) re-register and re-start the BES dispatcher service...1) confirmed registered at c:\program files\exchsrvr\bin 2) and same version as on exchange server. Apparently the intellisync config file has been corrupted. DLL: 6.5.7638.2 (C:\WINNT\system32\cdo.dll) Where is supposed to have to be the MAPI32 and EMSMDB32 files on the BES?I found the solution below which worked for me after trying several others; wanted to share it and hopefully save someone some time. An important thing to keep in mind is that unless your device is connected to your computer, you will not be able to review your synchronization settings.To learn about a feature on your Black Berry 10 smartphone or troubleshoot an issue, there are several great options available to help.You'll either need to remove the blackberry service account from domain admins, or adjust the exchange permissions accordingly.