I can see that there are similar questions about this for various versions of Outlook, but the answers don't quite make sense to me. Using the Windows dialing rules control panel seems to be quite complicated.
Let me explain: I'm in the UK. We have dialing rules that are different, depending on where you are and which device you use to call (mobile or landline). I want to sync my Gmail contacts with Oulook, so I purhcase Gsyncit. Unfortunately, when I set it up so that there would be two-way syncing, even though Gmail was set as the 'senior' source of contacts, Outlook would import the contacts, then strip some of them of the '+' symbol at the front of the number. Other numbers stored in Gmail Contacts start with '0' instead of '+44' and these are unaffected.
With that in mind, the Windows dialing rules 'fix' doesn't make sense to me. I'm not sure how putting in my local area code (eg, 01772 or 0207) will somehow prevent Outlook from stripping my contacts of the '+' symbol.
Is there a permanent fix that will stop Outlook from having any involvement in how it formats telephone numbers?