Here is STEP 2 for preparing your computer for Microsoft 365.
You need to change your password to the new Microsoft 365 requirements. These requirements are:
The password must be 8 characters and include (3 of 4) lower case, upper case, numbers or special characters.
You can change your password by opening the Microsoft Online Services client, selecting the “Options” tab and clicking “Change Password”.
You can find the Microsoft Online Services client on the bottom right toolbar are in the program group “Microsoft Online Services”.