Quite a few solutions nowadays.
- The most easy (but somewhat 'classic') solution is to buy and install Exchange at some server.
- Not much more difficult: implement an online Exchange somewhere in the 'cloud'. It's offered by Microsoft (http://www.microsoft.com/online/exchange-online.aspx)and many other vendors. What we call SaaS.
- There are some Exchange clones. Might be cheaper then the real one, but you'll find less support. Start with http://wiki.samba.org/index.php/Exchange_Server_Alternatives
- Go online totally with Google Apps. Includes a shared calendar. You might need to dump MS Outlook.
My boss asked me for an advice in this matter, but i'm also not a big specialist, so searching for some tips here. Basically what we want is to manage all the tasks, meetings in the calendar and contacts, so when edited everyone can see that. And there should be editing of this data allowed only for some defined users.
We don't have Exchange Server. Operating system is Windows Seven, Outlook 2010.
In the internet every company giving some soltions seem to be good, because I don't know what we really should look at.
I'd be grateful for a reliable opinion of someone using such an application as I assume we have to purchase an appropriate programme to achiave our goal (?)