Google Apps for Medium Size Business

This can be done in 4 phases in 30 days

 

Week 1

• Set up organization's Google Apps account
• Set up mail routing
• Determine mobile strategy
• Tell users about the transition
• Start provisioning users

 

Week 2

• Finish provisioning users
• Start migrating email and other data
• Plan Helpdesk operations
• Announce go-live date

 

Week 3

• Finalize mail routing/go live
• Configure mobile devices
• Run Helpdesk

 

Week 4

• Run Helpdesk
• Configure mobile devices
• Complete any remaining tasks

 

See this for more information

Check the change management activities and timeline template here

Check the Technical Transition Guide here