Microsoft Teams Migration to Another Tenant with All Threads

In 2026, moving to Microsoft Teams doesn’t have to mean losing your chat history, as we at CloudFuze preserve every conversation, thread, and reply with precision.

For IT admins, CTOs, and enterprise IT teams, mergers, acquisitions, and tenant consolidations make Microsoft Teams tenant-to-tenant migrations a high-stakes challenge, especially when chat threads and reply history must be preserved.

This guide explains how we at CloudFuze deliver high-fidelity Teams-to-Teams migration for enterprises, preserving public and private channel threads.

Core Technical Challenges in Microsoft Teams Thread Migration

Migrating Teams conversations for large and high-growth enterprises presents several technical limitations:

1. API Throttling and Rate Limits

Microsoft Graph APIs enforce throttling that significantly slows down large migrations. Without intelligent queuing and retry logic, migrations can stretch from days to months.

2. Private, Group, and Channel Chat Complexity

1:1 chats and group chats require distinct service-account permissions and handling logic to accurately read and recreate conversation data. Public channel threads and private channel threads require separate permissions and migration logic to preserve conversation structure and context.

3. Delta Sync Requirements

Delta sync ensures continuous capture and migration of new or updated messages, threads, and attachments created after the initial migration. Without delta sync, messages generated during the transition window can be missed or lost.

At CloudFuze, we meet this challenge head-on with a purpose-built Microsoft Teams to Microsoft Teams migration tool.

Native Microsoft Tools for Microsoft Teams Migration to Another Tenant

As of early 2026, Microsoft’s Cross-Tenant User Data Migration (UDM) tool is still in public preview. It is a good move but has some important limitations when considered in the context of enterprises.

Main Limitations of Native UDM

1. Message reactions and Emojis are frequently removed
2. Threads that are externally-user-initiated tend
3. Self-chats (“You” space notes) are not supported
4. Severe Throttling in High Volume Tenants
5. Lack of control over delta sync automation

Such gaps make native tools unsuitable for organizations where thousands of users exist, as these organizations also possess years of conversation history.

CloudFuze: Best Tool for High Fidelity Microsoft Teams Thread Migration

At CloudFuze, our goal in Microsoft Teams migration is to move all conversations and data from the source to the destination. Our tool relies on sophisticated Graph API orchestration and managed message injection to recreate the source-tenant experience at the destination.

We support the migration of 1:1 conversations, group conversations, public channel conversations, as well as private channel conversations with full fidelity support. We ensure that the transition doesn’t result in the loss of any conversation contexts.

Feature Comparison: Native Microsoft Tools vs. Enterprise-Class Tools for Migrating from Teams

When using CloudFuze, users can log in back into the Teams environment in the new tenant and continue the conversation right where they have left off.

Pre-Migration Planning of Microsoft Teams Migration Between Tenants

Key pre-migration steps include the following:

• Inventory all Teams, channels (public and private), users, and chat volumes
• Map identities using CSV-based UPN matching
• Pre-configuration of licensing and permissions in both tenants
• Run pilot migrations for 1–2 business-critical Teams
• Conduct compliance risk audits on GDPR, retention, and eDiscovery.

At CloudFuze, early risk identification is facilitated through pre-migration scans that help organizations avoid surprises for predictable and smooth migration.

5 Steps for Tenant to Tenant Teams Migration with All Threads

Here are some simple steps for transferring chat threads with the help of our Microsoft Teams to Microsoft Teams migration tool:

1. In the CloudFuze web app, log in to add both source and destination Microsoft Teams tenants using global admin credentials.
2. Confirm that both tenants appear under Manage Clouds and then set the source and destination in the Messages Migration Dashboard.
3. Create a pre-migration summary to identify users, Teams, channels, chat threads, and total message volume.
4. Map the source using CSV or auto-mapping, and then select Teams, channels, chat threads, and direct messages to migrate.
5. Perform the migration and follow an overview of the progress using detailed reports that keep track of the completion of each thread.

Private Teams Channel Thread Migration: Before and After

Before Migration (Left):

The screenshot shows the private channel threads in the source tenant, showing original messages, replies, emojis, and images within the conversation thread.

After Migration (Right):

With CloudFuze, all private channel threads are migrated to the destination tenant with full fidelity. Messages, threaded replies, images, and timestamps are preserved. This ensures members continue conversations smoothly without losing context.

Public Teams Channel Thread Migration: Before and After

Before Migration (Left):

The public channel includes a thread of active conversations with numerous replies, attachments of files, and timestamps. Messages, replies, and files shared are organized within the original thread structure in the source tenant.

After Migration (Right):

With CloudFuze, the same public channel thread is replicated in the destination tenant with complete continuity. The result retains all parent messages, threaded replies, attachments, and timestamps.

This allows users to reply in the thread and continue collaboration without disruption.

Post-Migration Validation and Compliance Checks

Essential validation procedures for Microsoft Teams migration to another tenant involve:

1. Verify chat searchability & thread continuity
2. Attachments & Inline Files Verification
3. Check permissions & Access Controls
4. Examine migration dashboard data and exception reports
5. Store source tenant data until final sign-off

We at CloudFuze provide detailed audit logs and validation reports to support compliance and governance teams.

Top Tips for Large-Scale Microsoft Teams Migrations

1. First, prioritize business-critical teams.
2. Use CSV-based user mapping for accurate results
3. Apply filters, including date ranges, to control scope
4. Schedule migrations during off-hours
5. Preserve source data until the end of post-migration validation
6. Employ managed services such as CloudFuze to handle throttling and compliance

At CloudFuze, our team of professionals works according to proven enterprise best practices to eliminate downtime and risk. This prevents rework during Microsoft Teams migration to another tenant.

Teams To Teams Migration Cost

The migration cost for Microsoft Teams to another tenant depends on the number of users, channels, chat threads, files, and attachments.

For a detailed quotation based on organizational requirements, kindly contact our support team.

Start Your Microsoft Teams Migration with All Threads Intact

Everything moves securely, compliantly, and at scale with CloudFuze: every thread, every reply, every mention, and every timestamp. Ready to plan your Teams tenant-to-tenant migration?

Contact CloudFuze’s migration specialists for a tailored migration roadmap and to run a free pre-migration Microsoft 365 environment assessment.

Frequently Asked Questions

1. Can private channel conversations be migrated intact between Microsoft Teams tenants?

Yes, private channel conversations can be migrated with the help of more advanced migration tools. Full private channel thread migration with CloudFuze is fully supported, retaining message hierarchy, access permissions, and associated files, which is usually not possible in native tools.

2. Which tools fully preserve Microsoft Teams threads and attachments when migrating?

CloudFuze Migrate transfers all the Teams threads completely with replies, mentions, attachments, metadata, and original timestamps to let the users retain full conversation history in the destination tenant (as shown in the above screenshot).

3. Are there tools to help in migrating Microsoft Teams threads across tenants?

Enterprise migration solutions like CloudFuze are specifically designed to make migrations of Microsoft Teams discussions, such as 1:1, group, and channel discussions with a greater level of precision and automation.

4. How can I check if threads and channels have been successfully migrated?

Validation after migration includes:

• Chat search functionality
• Threads
• Attachments
• Permissions
• Metadata

Audit logs provided by CloudFuze can then help validate that all one-to-one conversations, group chats, as well as channel threads, were migrated correctly.