Hi Aldu,
I would like to confirm the following things:
1. Which Office 365 plan are you using? Has the tenant upgraded?
http://office.microsoft.com/en-us/help/am-i-using-office-365-after-the-service-upgrade-HA103982331.aspx
2. Check if the Dirsync tool is downloaded from
http://technet.microsoft.com/en-us/library/jj151800#BKMK_InstallDirSyncTool
3. What’s the detailed error message when trying to run/uninstall Dirsync? Could you capture a screenshot of the errors here?
Based on the current situation, I have involved general troubleshoot steps for your reference.
How to troubleshoot Windows Azure Active Directory Sync Tool installation and Configuration Wizard error messages in Office 365
After referring to the article and the issue persists, please feel free to post the detailed information requested for further investigation.
Thanks,
Johnny Zhang