Pre-Scan: Microsoft 365 Migration for Tenant to Tenant Plan

A pre-scan for Microsoft 365 tenant-to-tenant migration is a full assessment of your source and target environments before you start the migration process. This is a critical step to analyze data, users, permissions, configurations and potential issues or risks before you actually migrate, so you can migrate smoothly and with minimal disruption.

At CloudFuze, we offer specialized and comprehensive pre-scan of your Microsoft 365 data to fully prepare and configure it in advance that assures a risk-free, error-free, and disruption-free Microsoft 365 tenant-to-tenant migration.

Why Is a Pre-Scan Important?

The pre-migration (pre-scan) stage is usually regarded as the most important part of a tenant-to-tenant migration project because it helps:

• Identify technical or compliance bottlenecks prior to causing problems
• Eliminate data loss risk and reduce downtime
• Enhance end-user experience by confirming proper permissions and access upon cutover
• Enable IT teams to plan, test, and validate the migration with realistic data and use cases

A pre-migration evaluation is a proactive process that uncovers hidden complexities, aligns technical and business goals, and creates a comprehensive migration roadmap. This extensive planning reduces surprises, reduces risks, and ensures uninterrupted continuation of services during migration, avoiding unexpected disruptions.

8-Step Pre-Scan Checklist for Microsoft 365 Tenant-to-Tenant Migration

1. Take Inventory of All Microsoft 365 Workloads

The first step of the Microsoft 365 Tenant-to-Tenant migration pre-scan checklist is to obtain a full understanding of what services are being utilized throughout your environment.

Take a full inventory of all users, mailboxes, groups, Teams, channels (public, private, shared), SharePoint sites, OneDrive accounts, and related workloads within the source and target environments. Each workload you intend to migrate must be analyzed.

Also, check total storage usage to ensure no quotas are exceeded in the target tenant. This ensures that no critical service is missed and allows you to scope the size and complexity of the project early on.

2. Check Admin Credentials and Access Permissions

To perform a successful Microsoft 365 cross-tenant pre-scan and migration, you must have correct global admin access on both destination and source Microsoft 365 tenants.

Additionally, verify application-level permissions and consent for the Microsoft 365 to Microsoft 365 migration tool. Inadequate or incorrectly configured admin rights may halt the pre-scan or provide incomplete results. Therefore, validating credentials upfront saves time and headaches down the road.

3. Map User Accounts and Groups

One of the primary challenges of transferring Microsoft 365 to Microsoft 365 is accurately identifying and organizing user accounts. As part of the pre-scan, collect an entire list of user accounts, distribution lists, shared mailboxes, Microsoft 365 Groups, and Teams. Identify inactive users, orphaned accounts, and any users associated with terminated licenses.

4. Report Mailbox and Storage Volumes

Scan all shared and user mailboxes for total mailbox size and number of items in your Office 365 tenant to tenant migration step by step pre migration assessment.

The same goes for OneDrive to OneDrive migration and SharePoint to SharePoint migration, particularly for those high-volume departments such as Legal, Finance, or Marketing. This serves to prioritize large mailboxes, identify legacy content that may not be migrated, and estimate bandwidth and timeline needs.

This information is vital to map users correctly between tenants and group them into logical migration batches by roles, departments, or data size.

5. Audit Sharing Links and Permissions

Perform a permissions audit to reveal possible access conflicts. Search for broken inheritance within SharePoint, intricate ACL structures, and shared files with external or anonymous links.

Most of these links will be broken after migration if they are not remapped or replaced, so marking them now maintains collaboration continuity.

6. Review Calendars and Delegation Settings

Calendars are easy to overlook but are essential to business processes. In the pre-scan, find recurring meetings, shared calendars and delegated permissions.

This is the phase to look for unsupported items such as color-coded categories or rules based on legacy mailboxes that would fail in migration.

7. Scan Microsoft Teams and Associated Services

Teams consolidates a variety of services such as chats, files, tabs, apps, and SharePoint-backed channels into one place.

Scan your entire Teams environment ahead of time to find private channels, connected third-party apps, or apps like Planner that are not migrating natively. Understanding what will and will not migrate influences end-user expectations.

8. Domain Verification and Licensing Check

As part of the pre-scan for tenant-to-tenant migration, we at CloudFuze verify that all necessary domains can be successfully registered and validated in the target tenant. We also ensure that the destination environment has adequate and appropriate Microsoft 365 licenses assigned for all users and workloads. This prevents any disruptions during the actual migration (one-time migration).

8. Review Compliance Flags and Security Risks

Lastly, employ the pre-scan to identify sensitive content, inactive accounts, and weak access controls. Always select tools that are ISO 27001 and GDPR compliant, employ RSA 2048 encryption, and meet enterprise-grade security standards.

CloudFuze Migrate, the best Office 365 tenant-to-tenant migration tool, is designed with these protocols for a secure and compliant migration process.

CloudFuze’s End-to-End Coverage of Microsoft 365 Tenant Pre-Scans

At CloudFuze, we offer an advanced Microsoft 365 tenant migration tool that makes tenant to tenant migrations easy with deep pre-migration intelligence.

Our tool scans and inventories everything like users, mailboxes, Teams (public, private, shared channels), SharePoint sites and OneDrive accounts across both source and target tenants. We validate global admin credentials, check permission scopes and alert you to any misconfigurations so you don’t get delayed.

Our platform supports automated user and group mapping through CSV, APIs and smart logic, flags inactive or orphaned accounts and organizes users into logical migration batches. We help prioritize workloads by analyzing mailbox sizes, item counts and storage usage.

You can book a session with our enterprise migration team now and take the first step toward a hassle-free Microsoft 365 transition.

Best Practices

• Utilize detailed pre-scan and inventory reports to inform your migration scope and timeline
• Engage technical and business stakeholders in planning and review cycles
• Perform pilot/test migrations on a representative subset of users and data to prove assumptions
• Create user communications and training on any expected changes or disruptions

Let us help with a free pre-scan consultation!

For large organizations with TBs or PBs of data and thousands of users, a comprehensive pre-scan sets the stage for a secure, compliant, and disruption-free Microsoft 365 tenant-to-tenant migration.

At CloudFuze, our pre-scan engine is built for scale and depth, providing you complete visibility into what’s next.

Ready to get started? Schedule a complimentary pre-scan consultation.

FAQs

Q1: Which third-party tools or solutions are best for tenant migrations?

For Microsoft 365 tenant-to-tenant migrations, the most popularly recommended and feature-dense tool is CloudFuze Migrate. Our solution provides complete tenant migration (Teams, advanced mail, SharePoint, permissions) with enhanced reporting, customization and support for complicated environments.

Q2: How can pre-migration assessments help avoid unforeseen disruptions?

Important ways pre-migration assessment helps avoid disruptions for tenant-to-tenant Microsoft 365 migrations include:

• Near risk and dependency identification
• Complete inventory and environment review
• Confirmation of licensing, domain, and compliance
• Cost and resource planning
• Testing and validation opportunity
• Enables stakeholder communications and governance
• Backup and contingency planning

Q3: How do I reduce the disruption of services during a tenant-to-tenant migration?

By using meticulous planning, phased rollout, automated solutions, environment validation, backup and rollback strategies, pilot testing, and open communication, organizations can mitigate the risk of downtime and maintain business continuity during tenant-to-tenant Microsoft 365 migrations. CloudFuze promises zero downtime with your migration.