Is it possible to create mailbox databases in Exchange 2013 that are less than the total quota limits of the mailboxes within?
Here is the situation: we are a smaller organization about to upgrade from E2007 to E2013. Our current mailbox database (we only have one) is 144GB. Because of this, our storage capacity on our new Exchange server is over 800GB, which we thought would be more than enough. However, we offer 2GB storage quotas, and have 556 mailboxes, so the Exchange Server Role Requirements Calculator is spitting out a requirements of over 1.1TB for database storage alone, and that is after decreasing the quota on most of the mailboxes to just 1GB.
I realize we did this backwards, and I would like to not to replace a bunch of drives on a brand new server. Because we know that most mailboxes won't ever use 2GB storage (the average mailbox size is < 250MB), is it possible to have mailbox databases that technically don't have enough storage for everyone to fill their quota? Would it be a huge mistake to go that route, even if it is technically feasible?
Thanks in advance for your help.