How to use PowerShell to force policy to apply

1. Run PoweShell as administrator.
2. Run Login Office 365 command: $UserCredential = Get-Credential
3. Run session command: $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $UserCredential -Authentication Basic -AllowRedirection
4. Run import session commnad: Import-PSSession $Session -DisableNameChecking
5. List the mailboxes status command: get-mailbox
6. Start-ManagedFolderAssistant -Identity “mailbox name”

Note: mailbox name could be username@company.com.