I’m using the calculator to size Ex2016. I’ve a very high percentage of mailboxes belonging to leavers which need to remain in on-prem Exchange for a number of years (yes, I’ve looked at other options to deal with these but it is what it is ... don’t ask!!). Clearly these mailboxes don’t send/receive msgs anymore and they are very infrequently accessed. How do I factor these into the calculator to ensure I’ve the storage for them and to accommodate the required Exchange horsepower to perform maintenance on them (indexing, defrays etc.) but so these don’t unnecessarily push my server count/specs up?
Any pointers would be really appreciated. Thx.