If you don't have a Marlow Office 365 account connected to @marlowgroup.com, select the first option Microsoft Account
Enter the email account you received the invitation on, if your account is not associated with
a Microsoft account you will get the below and you will need to create a new account.
Select Create One
Enter the email you got the SharePoint invitation on and click Next
Enter your own personal password and click Next
Enter your first and last name then click Next
Enter your country, birthdate and click Next
Check your email. Microsoft will send you a code to verify you own the email address. Enter
the code and click “Next”
Click YES and Dont show this again in order that you don't need to sign in every time