After configuring Azure AD Connect to sync my on-premise Active Directory users to Office 365, I wanted to force a sync to Azure, here’s the PowerShell command.
Start-ADSyncSyncCycle -PolicyType Initial Start-ADSyncSyncCycle -PolicyType Delta
Using the Initial option will force a full sync of the directory.
Using the Delta option will only sync the changes from the directory.
Note that an ‘Initial’ sync will take a little longer to process than the ‘Delta’ option.
Tip: Use the ‘Synchronization Service Manager’ to monitor the sync progress.