If you're synchronizing your on-premises Active Directory with Office 365 and the user is already licensed for Skype for Business Online but still can't sign-in, make sure that the value of msRTCSIP-UserEnabled is TRUE in the on-premises Active Directory schema. Force a directory synchronization, and then wait 30 minutes. To do this, follow these steps:
- If you’re in a Lync hybrid environment and still running Lync Server on-premises, enable the user for Lync through the Lync Control Panel or Lync Management Shell, and then move them to Skype for Business Online.
- If you aren’t in a Lync hybrid environment, but still have an on-premises Lync Server, delete the user from the Lync Control Panel or Lync Management Shell. Deleting the user and not just disabling them, from Lync will remove the values in msRTCSIP attributes for the user. You can also follow the next steps to manually fix the issue.
- If you previously had an Office Communications Server (OCS) or Lync deployment that’s no longer being used, you may have to manually edit the user’s msRTCSIP attributes to fix the issue. Open Active Directory Service Interfaces Edit (ADSIEdit) from the on-premises domain controller. For information about ADSIEdit, go to the following Microsoft website. (This includes information about how to add ADSIEdit to the Microsoft Management Console [MMC].)
- Locate the user who can't sign in to Skype for Business Online. To do this, build an LDAP query in ADSIEdit. For help in building the appropriate query and in locating the correct user, go to the following Microsoft website:
- When the correct user is found, change the msRTCSIP-UserEnabled attribute to TRUE.
- Use the Force the Directory Sync Tool to sync with Office 365, and then wait approximately 30 minutes for the change to take effect in Office 365.
For more information about how to synchronize your directories, go to the following Microsoft website:
- You are running the Active Directory Sync Tool together with an on-premises Active Directory schema.
- You have or previously had a deployment of Lync Server 2010 or of Office Communications Server 2007, together with Active Directory schema extensions.
- In a previous deployment, the msRTCSIP-UserEnabled attribute was set to FALSE. This attribute value is synced to Office 365 and disables the Skype for Business Online license of the Skype for Business Online user who can't sign in. (However, the Skype for Business Online license is still displayed as enabled in the Office 365 portal.)
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