System.Runtime.InteropServices.COMException (0x800A03EC): Microsoft Office Excel cannot access the file

On some versions of Windows Server, you might see this error when trying to access office file. And from here, the solution is extremely easy (and weird).

1. Create directory "C:\Windows\SysWOW64\config\systemprofile\Desktop " (for 64 bit Windows) or "C:\Windows\System32\config\systemprofile\Desktop " (for 32 bit Windows)

# for 64 bit Windows

    New-item -ItemType Directory -Force -Path "C:\Windows\SysWOW64\config\systemprofile\Desktop"

# for 32 bit Windows

    New-item -ItemType Directory -Force -Path "C:\Windows\System32\config\systemprofile\Desktop"

1. Set Full control permissions for directory Desktop (for example in Win7 & IIS 7 & DefaultAppPool set permissions for user
   "IIS AppPool\DefaultAppPool")

How to sync outlook to Google Calendar

Updated at 1/22/2016:

Since Google Calendar Sync isn't working for a long time. I've found this tool (gSyncit) is quite simple and useful. A small amount of money saved me lots of time. I'm only using it to sync all events from Outlook to my Google Calendar. But actually you can do a lot of more on it.