Migrating Slack Direct Message History to Microsoft Teams

Migrating direct message history (the older messages) from Slack to Microsoft Teams is simple. However, it may not be straightforward for many companies that have specific migration needs, such as migrating DM history of specific extent.

This post explores the various aspects of Slack DM history migration to Teams with CloudFuze to help IT admins understand the dynamics of the processes.

Migrating Slack DM History Between Same and Different Users

There are several differences in mapping when it comes to migrating Slack DM history between the same and different user accounts in Slack and Microsoft Teams. Check out the basic differences below:

Slack Direct Messages History Migration Between Same User Accounts

Migrating Direct messages between the same user accounts in Slack and Microsoft Teams is fairly straightforward. CloudFuze makes it simpler with an auto-mapping feature that automatically maps Slack and Teams user accounts based on their email aliases.

Here is how auto-mapping looks like in CloudFuze’s Slack to Teams migration tool:

Slack to Teams automapping

DM History Migration Between Different User Accounts

Unlike the previous case, auto-mapping does not work when migrating Slack DM history between different user accounts in Slack and Teams. The best way forward to mapping the different user accounts is through CSV mapping.

With CSV mapping, IT teams do not face any challenges in creating variations in user mapping. Here is an example of mapping a particular user account to another in a CSV file.

Slack to Teams CSV mapping
CloudFuze X-Change then populates the data from the CSV file and loads the mapping for migration of DMs, Channels, and other aspects.

CloudFuze Slack to Teams CSV mapping

Migrating Slack DM History of Inactive User Accounts

In many cases, companies need to migrate Slack DMs of inactive user accounts, e.g., inactive accounts of ex-employees. To do this, the IT team can either create user mapping at the admin level or simply map in a standard way.

CloudFuze’s Slack to Teams migration engine will successfully migrate DMs of the inactive accounts and attribute it to the mapped user account with the (via user) status.

Migrating Slack DMs of inactive user accounts

What Is the Ideal Extent of Slack DMs History To Migrate to Teams?

There is no standard parameter that can define to what extent/length of Slack DMs history a company should migrate to Microsoft Teams. It mostly has got to do with business-focused goals. For example, if your company’s business-aligned goals are to ensure 100% replication of the Slack environment in Microsoft Teams, then it is worth migrating all the DM’s history.

On the other hand, if your team has planned to keep the migration project lightweight for cost optimization and a shorter timeline, migrating DMs selectively works best.

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