Not able to send invoice by email with office365 on quickbook 2012

Hi

Previously my client able to send invoice by email on QB 2012 Premium version

with their office365 outlook. 

Recently this email feature stop working. We had tried to repair the QB and

check the QB send form details without any success. It keep prompting us

for password when sending by email.

We had checked the password given is correct. PDF creation for the

invoice also working fine. 

Anyone facing the same issue, please kindly advise me how

to fix this issue. We suspect some changes at office365 that cause it. 

Thank you

My client smtp setting for QB

My client email address

smtp.office365.com

Port : 587

SSL enable