Datacenter uptime
Microsoft Office365 Emailbox:   99.9% uptime

Advanced Enterprise Email Security (AEES):   99.999% uptime

Mailbox size

Microsoft Office365 Emailbox:   50 GB

Advanced Enterprise Email Security (AEES):   5,000 GB and above

Able to upgrade mailbox space
Microsoft Office365 Emailbox:   No

Advanced Enterprise Email Security (AEES):   Yes (Cost fully subsidized by SME Grant)

Attachment size
Microsoft Office365 Emailbox:   25 MB

Advanced Enterprise Email Security (AEES):   50 MB

Mobile device enterprise remote security wipe
Microsoft Office365 Emailbox:   No

Advanced Enterprise Email Security (AEES):   Yes

Support

Microsoft Office365 Emailbox:   Support provided to 1 appointed POC in the company

Advanced Enterprise Email Security (AEES):   Support for all users in company