Outlook 2016 and deleted mails

Hi,

I'm using Zimbra 8.7.11 and ZeXtras 2.6.1 with Outlook 2016 x64.

I don't know if this is a problem from Outlook or ZeXtras so I start contacting this forum...

Account synchronization seems to works well (mails, contacts, calendars) and shares too. But isn't finished yet (still in progress).

The synchronization is running since 3 days (my account is a little big, and I have shared access to some other accounts...).

Actually, all deleted emails on Outlook are still present on Zimbra.

Is this due to synchronization not terminated yet or is it anything else ?

Thanks a lot for your help.

Best regards,