Zimbra Connector (ZCO): Outlook does not start: MAPI was unable to load the information service LSMSSP.DLL

Apparently, this error happens when the ZCO version (32 or 64 bits) does not match the installed Outlook version (32 or 64 bits) and is looking for the wrong libraries.

Solution

  • Unintall ZCO, download the ZCO version matching Outlook's (i.e the other one than the one giving you the error).
    or
  • Uninstall both Outlook and ZCO and re-install all 64 bits versions.

Tip to Get back into Outlook in safe mode

Open Outlook in Safe Mode from the Command Line

  • Select the keyboard shortcut Win+R to open the Run dialog box. ...
  • In the Run dialog box, enter outlook.exe /safe and select OK.
  • In the Choose Profile window, choose the default Outlook option and select OK to open that profile.
  • Outlook starts in safe mode.

Once Outlook started in safe mode,

  • Select the profile named Outlook.
  • In Options: Check Prompt for a profile to be used
    OK
  • Repair outlook if prompted
  • Close Outlook.

Properties ID: 000596   Views: 4279   Updated: 5 months ago