VirtualBox Guest Additions not working in Lubuntu 17.04 – Solved


Host OS: Windows 10 x64
VirtualBox Graphical User Interface
Version 5.1.26 r117224 (Qt5.6.2)

Guest OS: Lubuntu 17.04



I manually installed VirtualBox Guest Additions from VBOXADDITIONS_5.1.26_117224 ISO and restarted the guest.

The bidirectional clipboard and the drag and drop still not working.


Installation of Guest Additions from Ubuntu repository.


sudo apt-get install virtualbox-guest-dkms virtualbox-guest-utils virtualbox-guest-x11

Because I didn’t uninstall the ISO version, the setup process it asked me if I want to use the maintainer version or the latest version. Personally I chosed Y for the maintainer version. Here is a sample:

Setting up virtualbox-guest-x11 (5.1.22-dfsg-0ubuntu1.17.04.1) …

Configuration file ‘/etc/X11/Xsession.d/98vboxadd-xclient’
==> File on system created by you or by a script.
==> File also in package provided by package maintainer.
What would you like to do about it ? Your options are:
Y or I : install the package maintainer’s version
N or O : keep your currently-installed version
D : show the differences between the versions
Z : start a shell to examine the situation

It works! The above text was copied from clipboard directly from Guest OS Lubuntu 17.04 in Windows 10 host OS.

How to sync Microsoft Outlook with Google Calendar and other CalDav Calendars

For this purpose we need to use Outlook CalDav Synchronizer.

Here are the features and description from developer:

Free Outlook Plugin, which synchronizes events, tasks and contacts between Outlook and Google, SOGo, Horde or any other CalDAV or CardDAV server. Supported Outlook versions are 2016, 2013, 2010 and 2007.


  • free and open-source software (FOSS), the only free Outlook CalDav plugin (AGPL license)
  • tested CalDAV servers: SOGo, Google Calendar, Horde Kronolith, NextCloud, OwnCloud, SabreDAV, Synology NAS, GroupOffice, , Yandex, OpenX-change, Posteo, Landmarks, Kolab, Zoho Calendar, GMX, Tine 2.0, Fruux, Mac OS X Server, iCloud,, Radicale, Cozy Cloud, Cyrus Imap 2.5
  • two-way-sync
  • modern WPF GUI
  • Supporting OAuth2 for Google
  • SSL/TLS support, support for self-signed certificates
  • Manual proxy configuration support for NTLM or basic auth proxies
  • Autodiscovery of calendars and adressbooks via well-known redirects or DNS SRV/TXT lookups
  • configurable sync range
  • sync multiple calendars per profile
  • sync reminders, categories, recurrences with exceptions, importance, transparency
  • sync organizer and attendees and own response status
  • task support
  • CardDAV support to sync contacts (distribution lists planned)
  • Google native Contacts API support with mapping of Google contact groups to Outlook categories.
  • Google Tasklists support (sync via Google Task Api with Outlook task folders)
  • sync contact pictures, categories, notes and x509 certificates
  • manual or time-triggered sync
  • change-triggered sync
  • sync triggered by Outlook Send/Receive
  • Category Filtering (sync CalDAV calendar to Outlook categories)
  • map CalDAV server colors to Outlook category colors
  • show reports of last sync runs and status
  • configurable system Tray Icon with notifications
  • bulk creation of multiple profiles
  • Use server settings from Outlook IMAP/POP3 account profile
  • Map Windows to standard IANA/Olson timezones
  • Configurable mapping of Outlook custom properties

The project page is here:

Windows Server 2008 PDC external time

Internet time is hidden from control panel.
As a PDC, Windows Server 2008 need to be synchronized with external source.
You can select the closest NTP server from

Microsoft recommends (quote from

  1. Click Start, and then click Command Prompt.
  2. In the Command Prompt window, type the following line, where peers is a comma-separated list of IP addresses of the appropriate time sources, and press ENTER:w32tm /config /manualpeerlist: peers /syncfromflags:MANUALThe time sources you choose depend on your time zone. For example, if your domain controller is located in the Pacific Time zone, this line might read:w32tm /config /manualpeerlist: /syncfromflags:MANUALIn this example, the IP address of the timeserver is used instead of the fully qualified domain name for security purposes.
  3. Press ENTER. You should get a message that the command completed successfully.
  4. Type w32tm /config /update
  5. Press ENTER. You should get a message that the command completed successfully.W32time uses a variable poll interval based on the quality of timesync with the server. On DCs, this interval defaults to between 64 and 1024 seconds.
  6. To immediately synchronize with the external time server, type w32tm /resync and press ENTER. You should get a message that the command completed successfully.
  1. Type Exit and press ENTER.

For Canada we can use wich has the ip or

w32tm /config /manualpeerlist: /syncfromflags:MANUAL
w32tm /config /syncfromflags:manual /manualpeerlist:”,0×1,0×1 ” /update /reliable:yes