I need your advice on choosing what upgrade option is better for this environment.
exchange 2003 std
Cloud based office 365 or on-premise exchange server upgrade to 2013 and office 2013?
-We do regular mass emailing to about 3000 clients, it usually takes about 30-60minutes to send them all. If Office 365 is the choice, do I have this mass emailing feature?
-What about spam filtering? Is there administrative console provided by office 365? Is it flexible to adjust to our business specifics?
As of doing some pricing, I don't see benefit of migrating to office 365... after 3 years when I upgrade system to on-premise setup:
Office 365 Small Business (Outlook only, I guess):
$5/month X 80 X 12 X 3yr=$15200 after 3 years.
Office 365 Small Business Premium(Outlook+desktop office):
$15/month x 80 x12 x3yr=$45600 after 3 years
Comparing to On-premise exchange server 2013 +office 2013:
$700(Exchange server software) + $70(user cal) x 80= $6300
$200(office 2013 home and business) X 50 = $10000