Any customer thinking of migrating to Office 365 should use the O365 Deployment Readiness Tool as a prerequisite.
It is a “must” to run this tool to gather information about your platform if you are thinking of moving to Office 365. It checks whether your platform is ready to make a move to the cloud and if not, it will point out the steps to be taken to make your platform Office 365 ready.
The tool does the following assessments:
- Domains
- Email domain discovery and number of users leveraging each domain
- User Identity and Account Provisioning
- Statistical information
- Active Directory schema and forest/domain functional data
- Trusts extract (checks for multi-forest constraints)
- Directory Synchronization
- Pre-requisite checks
- Attribute assessment
- Single sign on
- Attribute assessment
- Exchange Online
- Statistical information
- Public folder, public delegates, and proxyaddresses extract
- 3rd party and unified messaging proxyaddresses information
- Lync Online
- Statistical information
- SIP domains summary
- SharePoint Online
- User object count assessment
- Client and End User Experience
- Summary of domain joined machines for rich experience/SSO readiness
- Network
- Port analysis on certain Office 365 endpoints
- DNS records assessment
You need to run the tool from a domain joined machine.

Download the tool here
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