[rarestia]

My understanding is that they couldn’t meet SLAs due to the sheer volume of data some companies were saving or planning to save. We initially looked at MS for mail journaling/archiving, but once we told them we were averaging 60 TB per year, they quickly changed their tune.

[tacticalogic]

They tried to sell us on Office 365 when we were looking for a mail archive solution, but when we got into the details of how it would have to be implemented and maintained it became apparent it wasn't really designed for that and it was going to be square peg in a round hole.

You also lose some control over things like access to protocol and diagnostic logs that can frustrate troubleshooting.

The salesman tried to pitch it as being just like having your own servers on-premises, but it's not.