How to upgrade from Skype for Business to Microsoft Teams
As a current customer of Skype for Business, Microsoft is inviting you to make the switch to Microsoft Teams. The upgrading phase might take some time, but Microsoft is here to help and provide the right level of support and guidance every step of the way. There is never a one-size-fits-all-solution so Microsoft has created two pathways that customers can take. Continue reading to learn more about both pathways and which one would be better for your company. 
Upgrade Basic: Is designed for smaller organizations that use Skype for Business for the IM (instant messaging) only or IM + basic meeting functionality. A company who requires a simple deployment can expect a timeframe of 30-45 days for the process to be completed. Microsoft has provided 10 steps for a successful upgrade of moving the entire organization from Skype for Business to Teams.
Step One: Notify your Key Stakeholders
Step Two: Prepare your organization for Teams
Step Three: Know your Skype for Business Users
Step Four: Notify your users that they’ll be upgrading from Skype for Business to Teams
Step Five: Activate the user upgrade notification
Step Six: Remind your users that they’ll be upgrading from Skype for Business to Teams
Step Seven: Upgrade users to Teams
Step Eight: Monitor Teams usage against your baseline
Step Nine: Measure user satisfaction
Step Ten: Maximize your ROI with Teams
Click Here for more information
https://docs.microsoft.com/en-us/MicrosoftTeams/upgrade-basic
Upgrade Pro: Is designed for larger corporations that require a more complex deployment such as with hybrid or voice. This route is divided into three different phases and will require a longer duration to complete the upgrade process. It allows the company to run Microsoft Teams alongside Skype for Business until Microsoft Teams is ready for the business. In order to ensure this is successful, Microsoft will also provide resources to prepare both technical and everyday users.
Click Here for more information
https://docs.microsoft.com/en-us/MicrosoftTeams/upgrade-pro
Pre-Upgrade: The Pre-Upgrade phase will prepare your company for Microsoft Teams. This phase will introduce Teams into your organizations' workflow by using Skype for Business and Microsoft Teams together. Allowing employees to begin learning how to use the Teams application. Employees will have a lot of time to test out Teams at their own pace and slowly start to migrate all their activities, contacts, and calendars. You’ll get to experience the value of Microsoft Teams and help your corporation speed up the process of Teams becoming ready for your company. Read the pre-upgrade checklist below to see if your organization is ready for the upgrade phrase:
Days 1-7: Create your upgrade plan to help ensure your organization is set-up for long term success
Days 8-15: Evaluate your organization’s readiness for Teams
Days 16-60: Run a pilot to confirm that your organization is read and inform your optimal journey to Teams
Day 60 until upgrade: Deploy Teams in coexistence with Skype for Business
Learn more about Microsoft Teams by downloading our whitepaper Microsoft Teams Cheat Sheet: Meet the Hub for Teamwork in Office 365. This whitepaper contains all the benefits of Teams and why you should make the switch. Find out why Microsoft has made Teams the primary focus for its intelligent communication platform.
Download our Whitepaper on Microsoft Teams Click Here to get started today