What is a good process to automatically synchronize contact lists to a Windows computer, iPhone, and VOIP telephone?

I work for a company in which the general manager has VOIP phone, Windows computer and iPhone devices.   The general manager has a list of contacts that he would like to have automatically synchronize to all of these devices.  Where would be the best place to edit this contact list and get it to synchronize to all of these devices automatically?  If there is a better process to do this I would appreciate input.  Thanks.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Kyle SantosQuality AssuranceCommented:
It should be possible if all those devices allow you to use an iCloud account.  e.g. if you edit a contact on your iPhone, then it will sync to iCloud and update for all other devices using the iCloud account.
On the iPhone go to Settings
Toggle on 'Contacts'.
Qian BaoDigital Media Specialist and Web DesignerCommented:
On the Windows machine, install iCloud for Windows. It will automatically sync up calendars and contacts within Outlook.
Eoin OSullivanConsultantCommented:
In my experience the GOOGLE Contacts is probably one of the best integrated solutions insofar as it works with iOS on the iPhone and Windows on a desktop/laptop.  The iCloud service works great on iPhone but not great on Windows and can be a little messy to setup with Windows People app and prefers to use Outlook which may not be desirable.
The big unknown is the VOIP phone - you'll need to provide much more detail on that .. the make/model and what VOIP service it is using.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.