Solving Microsoft Teams Licensing Error “errorCodeTeamsDisabledForTenantForbidden”

Launching Microsoft Teams

This post explains how to fix the “errorCodeTeamsDisabledForTenantForbidden” error when trying to add guest users to Microsoft Teams channel. This issue might arise when a user is invited to a channel in your organization’s Microsoft Teams for the first time. Fixing it usually just requires a flip of a switch, but might also include some waiting.

Symptoms

You get an error screen like this, when trying to join a Teams channel as a guest user.

Teams Guest access error

Teams Guest access error

No fear, though – likely an easy fix!

Reason

This is pretty simple: Teams usage is not enabled for guest users. The usage of certain services can be enabled for users with different kinds of licenses – and guest access is disabled by default. It nees to be enabled to allow external users (guests) to your teams channels, after which they’ll be added to your Azure AD as external users.

Solution: enabling Microsoft Teams license for guest users

To resolve the issue, you’ll need to do the following:

  1. Navigate to Office 365 Admin portal
  2. Access Settings > Services & add-ins > Microsoft Teams
  3. Enable Teams for Guest users (see below)
Enabling Teams for Guests

Enabling Teams for Guests

Luckily, this configuration should only need to be done once, and work after that for new users.

If it’s still not working, assign a license to the invited user (shouldn’t be required, but hell, you never know) and wait (for the Exchange Online mailbox to be provisioned).

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A Software Developer working on SharePoint, Azure, Office 365 and a lot of other stuff. Writing this blog to document interesting things I've found out here and there.

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