Considerations when assessing which mail and calendar items can be migrated to Office 365. (4271558)

Considerations when assessing which mail and calendar items can be migrated to Office 365.

It is important to be aware of the limits applied to a tenancy that may prevent the migration of certain mail and calendar items to Microsoft Office 365.

Limits are set in the Microsoft datacenters and may vary by type or duration of tenancy. Items that exceed these limits cannot be migrated from the on premise Microsoft Exchange organization and may prevent mailboxes being switched to Microsoft Office 365

Refer to the Microsoft article for Exchange Online Administrators at http://help.outlook.com/en-us/140/dd630704.aspx - "Message and Recipient Limits" for current guidance on these limits. Refer to the Microsoft Technet article at http://technet.microsoft.com/en-us/library/hh852418.aspx - "Mailbox Size Considerations" for suggestions on reducing mailbox size prior to migration.

Office 365 also has various throttling mechanisms that can impact migrations using tools such as Quest Migration Manager. Refer to the Microsoft Technet article at http://technet.microsoft.com/en-us/library/jj204570.aspx - "Migration Performance" for best practice on improving migration throughput. A network connectivity tool has been made available by Microsoft to assess the network prior to Office 365 deployment. - "Office 365 Fast Track Network Analysis" for the following regions: North America: http://na1-fasttrack.cloudapp.net EMEA: http://em1-fasttrack.cloudapp.net APAC: http://ap1-fasttrack.cloudapp.net