Skype For Business contact migration to Teams

Every now and then when migrating Skype users to Microsoft Teams the contacts will not migrate over. Here is a quick blog on what is required and limitations of what can be migrated over.

Requirements for SFB to Teams:

  • Users cannot be UCS enabled, The users contacts must be stored on SFB and NOT Unified contact store or UCS.
  • Obviously the users account must be online
  • Users need to be in Teams only for the contacts to be migrated


  • Only Federated and Tenant contacts will be migrated
  • Maximum number of contacts is 1000
  • Max number of groups is 64
  • Skype consumer contacts do not get migrated
  • Any distribution groups also will not get migrated

How the migration process works:

  1. The contacts will be triggered to migrate once the user clicks on the contacts tab in Teams. While this will trigger the migration the users will not see the contacts until the migration is complete and they have logged out and back in.
  2. If the migration fails it will re-trigger after 8 hours.
  3. If users are not enabled for federation the federated contacts will not migrate
  4. If users are UCS enabled then the contacts will not migrate. Once UCS is set to false and the contacts have moved over to SFB the process will re-trigger

UCS cmdlets can be found here:

Set-CsUserServicesPolicy -Identity global -UcsAllowed $False

Rollback the UCS policy by using Invoke-CsUcsRollback -Identity “user” if you do not roll back the user from UCS the contacts will not be removed for the contact store. If you do not change the policy and you run the rollback after 7 days the contacts will revert back to UCS.

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