troubleshooting Question

UPN issue.

Avatar of nav2567
nav2567Flag for United States of America asked on
ExchangeMicrosoft 365
4 Comments2 Solutions125 ViewsLast Modified:
In effort to migrate our Exchange 2010 users to O365, we have discovered we have a lot of users with duplicated UPNs.  

For ex, in the attached, the user login using adlopez but her User Logon Name in AD is "alopez".  There is also another users with that User Logon Name.  

2 questions:

1. Can I just rename and enter adlopez in the User Logon Name field without causing any issue?
2. Is User Logon Name is the same as UPN?

Thanks.
adlopez.png
SOLUTION
Adam Brown
Cloud Security Consultant

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Top Expert 2010

The Distinguished Expert awards are presented to the top veteran and rookie experts to earn the most points in the top 50 topics.

Join our community to see this answer!
Unlock 2 Answers and 4 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 2 Answers and 4 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros