Tuesday 5 February 2019

Changing your Multi Factor Authentication (MFA) options in Microsoft 365 without asking IT

When your IT department switch on multi factor authentication (MFA) for your company Microsoft cloud system you only have one chance to set it up - when you are first challenged.

Trouble is that you may want to change your MFA settings (i.e. how you get the second challenge).  For example, from an SMS message to your phone  to "Microsoft Authenticator" approval on your phone.

So, just go to :

https://aka.ms/MFASetup

and follow the prompts!


Thursday 31 January 2019

Checking MD5 SHA1 and SHA256 hash codes with Windows 10

It is a good practice to check the integrity of a downloaded file to make sure you actually get exactly what you are meant to get.

This can be done if the owner provides a hash code.  The hash code could be MD5, SHA1 SHA256 and I am sure there are or will be others but I will just comment on these three.

When using Windows 10, you don't need any special utilities to do a check.
Just open a command prompt
Type "command" in Windows Search next to the Windows button
Select "Command Prompt"

With the command prompt now open, go to your downloads folder
For example:

cd \users\(your_username)\downloads

Now, for an MD5 hash:

checkutil -hasfhile (yourfile) MD5

For an SHA1 hash:

checkutil -hasfhile (yourfile) SHA1

For an SHA256 hash:

checkutil -hashfile (yourfile) SHA256

The checkutil utility will display the hash of the file which you will need to compare with that supplied by the original owner of the file.

Example:
C:\users\marcus\Downloads> certutil -hasfile gpg4win-3.1.5.exe MD5

returns
MD5 hash of gpg4win-3.1.5.exe:
732614c35a846890718230cd73f96722
CertUtil: -hashfile command completed successfully.