Do you have a problem with your contact list in Outlook? I had. When I synchronized my contacts from my Nokia to Outlook 2003 En (but CZ too) I had all contacts without + international prefix. When I changed the number with adding + prefix, the fucking Outlook changed it back. The solution is in MS knowledgabase.

1. Start Outlook.
2. Open a contact.
3. On the contact, click the Actions menu, and point to Call Contact, and then click New Call.
4. Click the Dialing Options button.
5. Click to select Automatically Add Country code to Local Phone Numbers, and then click OK twice.
6. Save and close the contact.

The pervious steps only affect new contacts, and do not change existing contacts automatically. Use the following steps to apply this change to existing contacts:

1. Open a contact.
2. Click the Phone Number field that you want to update.
3. Press the SPACEBAR once, press the BACKSPACE key once, and then press ENTER. The phone number should change automatically.
4. Save and close the contact.

Or reimport contacts from mobile phone or previsously exported contacts.