Microsoft Windows Web Applications & Online Software

Office365 SMTP Send Emails as Shared Mailbox via

Go to admin center > Users > Active users.

Create a standalone user for the purpose of SMTP authentication, e.g. [email protected] with password XXYYZZ112233, as you don’t want to give the password of your existing users to apps (e.g. WordPress) that need to access your SMTP.

Edit the created account enabling SMTP authentication by Mail tab > Email apps > Manage email apps > Check “Authenticated SMTP” > Save changes.

SMTP account done.

Now, create a shared mailbox in Office 365 for the app to send email AS.

Go to admin center > Teams & groups > Shared mailboxes, and create a shared mailbox for your app, e.g. [email protected], with the newly created SMTP user as a member of it.

Wait 10 minutes or so for Office 365 to take this into effect so your new SMTP user [email protected] becomes a member of the shared mailbox [email protected].

Finally, you can use these as your SMTP details for your new app:

  • SMTP Host:
  • Encryption: TLS
  • Port: 587
  • SMTP Username: [email protected]
  • SMTP Password: XXYYZZ112233

And make sure to use the shared mailbox as From Email when you are sending, or Office 365 SMTP server will reject your request:

That’s it.

Microsoft Windows Web Applications & Online Software Office 365 Creating Shared Mailboxes by the Same Name under Different Domains

When you have multiple domains under the same Office 365 admin account, e.g.,, etc., you can’t directly create these emails:


Which would give this error when you try to create emails by the same name already used by another domain:

Now you can have a little circumvention to get around this by first creating the email with a unique local name and then creating an email alias to use the name you want.

Do as the following:


Microsoft Windows

How to Free C:\ Drive Disk Space in Windows 7 and Reduce System Size?

Windows 7 is a beast in consuming hard drive disk spaces, especially the system drive, C, which is constantly being filled up. After a while it will keep annoying you with low disk space warnings because C drive is running out of space and almost full. So how can I safely free up all the disk spaces in C drive in Windows 7 and reduce its disk storage?

The methodology is to find the fattest folders in C drive, move as many of them to another drive (such as D, E, etc.) as possible, and make symbolic links (by mklink) from C drive to the folders in other drives.

Step 1 – Find culprit folders that occupy the most disk space!

There are so many ways to do this but what I did was to look at the size stats for each of the major folders in my C drive. After 10 minutes, I was able to pinpoint these folders that are consuming large chunks of the disk volume:

  • C:\Windows\winsxs – very high-profile system folder that are not easily reduced / moved, which I’ll leave alone.
  • C:\Windows\Installer – Over 3GB, program installers that can be moved safely and easily.
  • C:\Users\Administrator\AppData\Google – About 0.8GB, Google products data such as those by Chrome.
  • C:\Users\Administrator\AppData\Mozilla – About 1.6GB, Firefox profiles and browser data.
  • Some folders in C:\Program Files – I wish I could move this entire folder but I couldn’t. I could only move some of the folders such as “Microsoft Games”.
  • Some folders in C:\Program Files (x86) – Same as above.

This is just my case. You may as well find totally different folders that need to be moved. After you have found something, proceed to step 2 to duplicate them elsewhere.

Step 2 – Copy these folders to another drive that is much more spacious!

This one is easy. Just perform the omnipotent Ctrl+C and Ctrl+V combination to copy these folders to another drive. In this example, we’ll copy these folders to their new destination – D:\C_DRIVE:

  • C:\Windows\Installer –> D:\C_DRIVE\Windows\Installer
  • C:\Users\Administrator\AppData\Google –> D:\C_DRIVE\Users\Administrator\AppData\Google
  • C:\Users\Administrator\AppData\Mozilla –> D:\C_DRIVE\Users\Administrator\AppData\Mozilla

After the duplications, proceed to step 3.

Step 3 – Delete original folders and create the symbolic links

Now we need to delete the original folders in drive C. Some files and folders in Windows 7 are owned by TrustedInstaller while some by SYSTEM that cannot be easily deleted by Administrator. To delete them, you have to acquire SYSTEM privileges to do this, because the most privileged account in a Windows 7 computer is SYSTEM, not Administrator.

To do this, just create a file named syscmd.bat and put in the following commands:

sc Create SysCMD binPath="cmd /K start" type=own type=interact
sc start SysCMD

Double click to run the file syscmd.bat and you will be prompted by a dialog with 2 buttons, click the top one to view the interactive message.

And you will enter a command line interactive mode with SYSTEM privileges which basically grant you full rights to the computer – you can do whatever you want now.

Run these commands one by one – line by line, you type in the command and hit enter:

rmdir /s /q C:\Windows\Installer
rmdir /s /q C:\Users\Administrator\AppData\Google
rmdir /s /q C:\Users\Administrator\AppData\Mozilla

Now that the original folders are deleted, we’ll make symbolic links in the same name so that any requests for these folders are correctly diverted to those on the D drive:

mklink /D C:\Windows\Installer D:\C_DRIVE\Windows\Installer
mklink /D C:\Users\Administrator\AppData\Google D:\C_DRIVE\Users\Administrator\AppData\Google
mklink /D C:\Users\Administrator\AppData\Mozilla D:\C_DRIVE\Users\Administrator\AppData\Mozilla

That’s it.

After these 3 steps, my C drive is successfully reduced in size by 5.4GB. I can move more folders to further enlarge / extend the free space but for now, it’s good enough for me.

Feel free to leave any comment about how you are doing with this approach.

Affiliate Programs Internet Tools Microsoft Windows PDF Tips & Tutorials

Software to Convert PDF to MS Word Format

PDFZillaOne of my friends has created a very useful piece of software to do PDF to Word conversions. I find his product a breeze to use so I’m recommending it to my fellow readers. Hopefully it would be of some use to you guys.

Differences between PDF and Word

PDF (.pdf) and MS Word (.docx, .doc) are probably two of the most popular digital file formats for readable documents that are intended for humans. The major difference between the two is that MS Word can be easily edited while PDF is a finalized container of postscript data that are essentially non-editable vector information. Although you can read text in a PDF document, they are actually vector graphics rather than plain text such as those in a MS Word document.

This difference explains why people would want to convert a PDF document to a Word one as they can then make changes to the content and make further use of it. A lot of online tools and desktop applications exist for this purpose, such as PDFZilla, which provides easy procedures to imitate an OCR process to scan and analyze the supplied PDF document and convert it into high quality editable Word, in just 3 clicks. A batch mode is also available for people who want to convert a large number of PDF documents.

How to convert PDF to Word?

This is as simple as 3 clicks. Here are the steps:

  1. Head to and download the latest version of the PDF to Word software.
  2. Run PDFZilla.
  3. Add a PDF file by clicking the big green plus / add button.
  4. Choose the destination format as Word Files (*.doc).
  5. Click “Start Converting Now” button.

Okay, that’s like 8 clicks, but you got have some clicks…😉

Selling PDFZilla for 75% Commission

Lots of my readers are webmasters, so I’m also thinking this might be a good chance to earn some bucks by promoting this software as it’s rather generous of my friend’s offer – 75% affiliate commission. It’s very rare to come by a product of such usability yet of such high commission rate. Definitely much better than those ClickBank hit and run. Think about it.