We help IT Professionals succeed at work.
Get Started

Exchange 2010 Error: 535 5.7.3. Authentication unsuccessful

12,053 Views
Last Modified: 2013-05-10
I have a 3rd party application that requires SMTP to send invoices. My exchange environment is EXCH 2010. I went ahead and created a relay connector specifying correct IP addresses and
Authentication set to: TLS, Basic Authentication checked. Permission Groups: Anonymous Users, Exchange Servers checked. When I use my personal account it works, but when trying to use CUSTOMERSERVICE account gives me an Error: 535 5.7.3 Authentication Unsuccessful. I HAVE CHECKED THE PASSWORD FOR THE CUSTOMER SERVICE ACCOUNT AND AM ABLE TO LOG INTO OWA WITH IT.
This environment was transferred from legacy Exchange 03, I heave read that some permissions may have not migrated, please help.
Comment
Watch Question
This problem has been solved!
Unlock 1 Answer and 2 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE