… Outlook and Exchange
A few years ago I was at a partner conference about virtualization (yes, I can do that, too) and we where sitting in the bar. A few business partners with beer, so the stories started to flow. I was the only one that used and administered Domino, everybody else was Exchange. One after the other shared their horror stories. Completely f… up databases, crashes all over the place, backups not working, mails lost in the thousands. You name it, they had it. All I could do was listing, because my horror stories with Domino couldn’t compete in any way with theirs. The worst I had was a very slow Domino, because somebody (head of IT) sent a very funny .ppt file to everybody in her address book. It would have finally made it through, but the rest of the company could not wait another 3 or 4 hours. It was around 2003 and internet connection was still a bit slow. Otherwise I can not remember ever having to panic with a Domino server. Some crashed once in a while, but I never those ugly situations as my Exchange colleagues.
Single message store is one of the problems. In addition to the backend headaches, Outlook as a client introduces its own set of support issues.