Contoso has 5,000 on-premises AD users and wants to sync them to Azure AD while keeping password hash synchronization. Some users report they cannot sign in to Microsoft 365 after the initial sync. What is the most likely cause?
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A
Azure AD Connect health service is not installed
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B
UPN suffixes in on-premises AD do not match a verified domain in Azure AD
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C
Password writeback is not enabled in Azure AD Connect
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D
The sync cycle interval is set too high