Operation Manual

recipients. Authorization keys are also used when encrypting
messages to improve privacy and prevent undue tampering or hacking
of your messages. You can encrypt a message with or without a
certificate. However, to read an encrypted message, you need a valid
certificate to decrypt it.
Note S/MIME encryption and digital signatures for Windows Mobile-based
devices are available only with Exchange Server 2003 Service Pack
2 or a later version that supports S/MIME. If you are not using one
of these products, or have not yet synchronized, these options are
unavailable.
Digitally sign and encrypt all messages
ActiveSync allows you to set up S/MIME e-mail encryption and signing.
You must obtain a valid certificate to sign and encrypt e-mail messages
successfully.
1. Tap Start > Programs > ActiveSync.
2. Tap Menu > Options.
3. Select the E-mail information type, and tap Settings. On the E-
mail Sync Options screen, tap Advanced.
To set up a sync relationship with a storage card
1. On the computer, open Windows Media
Player.
2. Click the Sync tab.
3. Select the storage card.
4. Click Set up Sync.
5. Choose whether to synchronize
automatically or manually.
For more information about Windows Media
Player on your device, see “Using Windows
Media Player” in Chapter 8.
4.5 Setting up E-mail Security
Windows Mobile on your device protects your Outlook e-mails through
Secure/Multipurpose Internet Mail Extension (S/MIME), which allows
you to digitally sign your messages as well as encrypt them.
Using authorization keys and certificates, S/MIME allows you to
digitally sign your e-mail messages to prove your identity to the
Synchronizing Information and Setting Up E-mail Security 69