I love technology, I do just about everything from coffee to Linux, Various forms of Windows, VMWARE, Hyper-V, Cisco, and on and on. I sometimes even run OS9 in a VM just cuz I can. I can't get enough, I need to try and test everything. I want to know everything that is going on in the world of technology so I can get my company the best possible solutions. It also allows me to form a balanced opinion, not just a narrow minded one from one blinded perspective. I'm not a narrow minded person living in a fantasy world of rainbows and unicorns. I know that over time, technology companies go up and down and I never want to be tied to a single companies technology.
Canon vs. Nikon is like comparing Windows vs. Mac - they both actually make great products these days. Your opinion about Windows and Outlook is dated and make it clear that your opinion is baseless and mainly consists of bias. Windows is easy secure, if you have the skills to secure it. Windows is easy to maintain, if you have the skills to do so. With group policy, one can lock down an OS so users cannot do damage.
If you and your vendors don't use Microsoft and are closed minded to it, then why and how are you using Exchange? That means you are indeed using Windows and Active Directory. Don't be a hypocrite. Who makes your file server? Please tell me you are using a Mac Mini server with it's notebook class NIC, have you tested your network performance? Me personally, I'm using 10GB Nics, dVMQ, vRSS, SR-IOV, and all the beautiful multi-core/threaded networking performance in Server 2012 R2 and Windows 8.1 with RemoteFX. It's a shame, but in the enterprise Apple is a decade behind in technology and performance. So while you might need the performance, we are moving 100MB-1GB files all day long and without top performance, what takes us minutes, could take hours trying to use a mac with it's feeble write performance. My PC's consistently get 800 to 850 r/w. While my Macs consistently get 50 write and 800 read. I tested that with SMB on my Windows File Server and SMB and AFP on my Linux File server. The AFP to the Linux file server gave me 150 write and 800 read. All my clients have SSDs, my servers are on RAID 10 arrays, SSD's, etc. The best of class hardware, best practices, bench tested for months before putting it into use, etc.
Now when it comes to iOS and mobile in the enterprise, Apple is leading the pack.
10.9 is a beautiful OS with a few killer flaws that are show stoppers for a lot of users. Apple dumped the open source SMB a few years ago due to licensing issues and has been using SMBX, their home-brew SMB protocol that does not work well. In 10.9, Apple upgraded to SMB 2 from SMB 1 (the rest of the world is already on SMB 3) and made SMB the default networking protocol. You probably didn't notice this since you don't seem to care about networking. While SMBX works now in 10.9.3 (Apple enterprise engineers told me that there was a bug in 10.9.2 and that was why I could not stay connected to SMB3 shares) ... sorta... it's very slow in write performance and is buggy when talking to the open source SMB that is used in most modern operation systems. This makes working with a Mac in a mixed networked environment difficult and challenging. BTW... even Apple Enterprise works with Active Directory and mixed networks with Microsoft. I know it's hard for you to deal with, but Mac networking does not meet the open standards you only allow in your networks. And that Active Directory you use, it's not exactly LDAP standard either.
So while the Mail/Cal/Address Book solution being nice for home users and basic business use, it's far from being enterprise class. I know this truth hurts, but it's not just my opinion. Outlook is how you do business in an enterprise environment. An app that allows managers to monitor and manage calendars, tasks, and messaging. With Lync and Unified messaging tightly integrated.
It's a sad truth... and not just a one sided opinion.