Use the following keys:

ctrl + alt + end

When you try to add a new exchange account on your iphone  you get ‘exchange account verification failed’ or ‘cannot connect to server’. This might also be causing Server ActiveSync 3005 errors in the event viewer.

In exchange 2003 (on server 2003)

1. Expand Global Settings

2. Right click Mobile Services and select properties

3.  Tick both boxes under ‘Outlook Mobile Access’ – Enable Outlook Mobile Access and Enable Unsupported devices.

4. Wait at least 5 minutes and try your iPhone again.

UPDATE: Microsoft have released a tool for testing active sync problems – it is very useful for diagnosing problems with iPhone connections.

https://www.testexchangeconnectivity.com/

In my most recent case the problem was caused by  deny access being set under the Microsoft-Server-Activesync website.

To fix: Open IIS manager, expand default website, right click on Microsoft-Server-Activesync and select properties, select directory security, click edit under IP address and domain name restrictions. Click Granted accces and click ok – restart IIS.

Open a command prompt (Start > run > cmd)

Type in:

iisreset

When trying to copy files from the OS X 10.5 (also happens in OS X 10.3 and OS X 10.4) to Windows Server 2003 you get the following error:

‘you cannot copy some of these items to the destination because their names are too long or contain invalid characters for the destination. Do you want to skip copying these items and continue copying the other items?’

On the 2003 Server:

Go to Security Settings, Local Policies, security Options.
Disable the following:
Domain member: Digitaly encrypt or sign secure Channel Data(Always)
Microsoft network server: Digitally sign communications (always)
Microsoft network server: Digitally sign communications (if client agrees)

Make sure that the Macs are mounting the network drive with SMB rather than AFP (this caught me out for a while). I don’t know how to fix the error with AFP however samba is good enough to use in 10.5.